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Abelev B, Adam J, Adamová D, Adare AM, Aggarwal MM, Aglieri Rinella G, Agocs AG, Agostinelli A, Aguilar Salazar S, Ahammed Z, Ahmad Masoodi A, Ahmad N, Ahn SU, Akindinov A, Aleksandrov D, Alessandro B, Alfaro Molina R, Alici A, Alkin A, Almaráz Aviña E, Alme J, Alt T, Altini V, Altinpinar S, Altsybeev I, Andrei C, Andronic A, Anguelov V, Anielski J, Anson C, Antičić T, Antinori F, Antonioli P, Aphecetche L, Appelshäuser H, Arbor N, Arcelli S, Arend A, Armesto N, Arnaldi R, Aronsson T, Arsene IC, Arslandok M, Asryan A, Augustinus A, Averbeck R, Awes TC, Aystö J, Azmi MD, Bach M, Badalà A, Baek YW, Bailhache R, Bala R, Baldini Ferroli R, Baldisseri A, Baldit A, Baltasar Dos Santos Pedrosa F, Bán J, Baral RC, Barbera R, Barile F, Barnaföldi GG, Barnby LS, Barret V, Bartke J, Basile M, Bastid N, Bathen B, Batigne G, Batyunya B, Baumann C, Bearden IG, Beck H, Belikov I, Bellini F, Bellwied R, Belmont-Moreno E, Bencedi G, Beole S, Berceanu I, Bercuci A, Berdnikov Y, Berenyi D, Bergmann C, Berzano D, Betev L, Bhasin A, Bhati AK, Bianchi L, Bianchi N, Bianchin C, Bielčík J, Bielčíková J, Bilandzic A, Bjelogrlic S, Blanco F, Blanco F, Blau D, Blume C, Boccioli M, Bock N, Bogdanov A, Bøggild H, Bogolyubsky M, Boldizsár L, Bombara M, Book J, Borel H, Borissov A, Bose S, Bossú F, Botje M, Böttger S, Boyer B, Braidot E, Braun-Munzinger P, Bregant M, Breitner T, Browning TA, Broz M, Brun R, Bruna E, Bruno GE, Budnikov D, Buesching H, Bufalino S, Bugaiev K, Busch O, Buthelezi Z, Caballero Orduna D, Caffarri D, Cai X, Caines H, Calvo Villar E, Camerini P, Canoa Roman V, Cara Romeo G, Carena W, Carena F, Carlin Filho N, Carminati F, Carrillo Montoya CA, Casanova Díaz A, Castillo Castellanos J, Castillo Hernandez JF, Casula EAR, Catanescu V, Cavicchioli C, Cepila J, Cerello P, Chang B, Chapeland S, Charvet JL, Chattopadhyay S, Chattopadhyay S, Chawla I, Cherney M, Cheshkov C, Cheynis B, Chiavassa E, Chibante Barroso V, Chinellato DD, Chochula P, Chojnacki M, Christakoglou P, Christensen CH, Christiansen P, Chujo T, Chung SU, Cicalo C, Cifarelli L, Cindolo F, Cleymans J, Coccetti F, Colamaria F, Colella D, Conesa Balbastre G, Conesa Del Valle Z, Constantin P, Contin G, Contreras JG, Cormier TM, Corrales Morales Y, Cortese P, Cortés Maldonado I, Cosentino MR, Costa F, Cotallo ME, Crescio E, Crochet P, Cruz Alaniz E, Cuautle E, Cunqueiro L, Dainese A, Dalsgaard HH, Danu A, Das K, Das I, Das D, Dash A, Dash S, De S, de Barros GOV, De Caro A, de Cataldo G, de Cuveland J, De Falco A, De Gruttola D, Delagrange H, Del Castillo Sanchez E, Deloff A, Demanov V, De Marco N, Dénes E, De Pasquale S, Deppman A, D'Erasmo G, de Rooij R, Diaz Corchero MA, Di Bari D, Dietel T, Di Giglio C, Di Liberto S, Di Mauro A, Di Nezza P, Divià R, Djuvsland O, Dobrin A, Dobrowolski T, Domínguez I, Dönigus B, Dordic O, Driga O, Dubey AK, Ducroux L, Dupieux P, Dutta Majumdar AK, Dutta Majumdar MR, Elia D, Emschermann D, Engel H, Erdal HA, Espagnon B, Estienne M, Esumi S, Evans D, Eyyubova G, Fabris D, Faivre J, Falchieri D, Fantoni A, Fasel M, Fearick R, Fedunov A, Fehlker D, Feldkamp L, Felea D, Feofilov G, Fernández Téllez A, Ferretti A, Ferretti R, Figiel J, Figueredo MAS, Filchagin S, Finogeev D, Fionda FM, Fiore EM, Floris M, Foertsch S, Foka P, Fokin S, Fragiacomo E, Fragkiadakis M, Frankenfeld U, Fuchs U, Furget C, Fusco Girard M, Gaardhøje JJ, Gagliardi M, Gago A, Gallio M, Gangadharan DR, Ganoti P, Garabatos C, Garcia-Solis E, Garishvili I, Gerhard J, Germain M, Geuna C, Gheata A, Gheata M, Ghidini B, Ghosh P, Gianotti P, Girard MR, Giubellino P, Gladysz-Dziadus E, Glässel P, Gomez R, Ferreiro EG, González-Trueba LH, González-Zamora P, Gorbunov S, Goswami A, Gotovac S, Grabski V, Graczykowski LK, Grajcarek R, Grelli A, Grigoras A, Grigoras C, Grigoriev V, Grigoryan A, Grigoryan S, Grinyov B, Grion N, Gros P, Grosse-Oetringhaus JF, Grossiord JY, Grosso R, Guber F, Guernane R, Guerra Gutierrez C, Guerzoni B, Guilbaud M, Gulbrandsen K, Gunji T, Gupta A, Gupta R, Gutbrod H, Haaland O, Hadjidakis C, Haiduc M, Hamagaki H, Hamar G, Han BH, Hanratty LD, Hansen A, Harmanova Z, Harris JW, Hartig M, Hasegan D, Hatzifotiadou D, Hayrapetyan A, Heckel ST, Heide M, Helstrup H, Herghelegiu A, Herrera Corral G, Herrmann N, Hetland KF, Hicks B, Hille PT, Hippolyte B, Horaguchi T, Hori Y, Hristov P, Hřivnáčová I, Huang M, Huber S, Humanic TJ, Hwang DS, Ichou R, Ilkaev R, Ilkiv I, Inaba M, Incani E, Innocenti GM, Innocenti PG, Ippolitov M, Irfan M, Ivan C, Ivanov V, Ivanov A, Ivanov M, Ivanytskyi O, Jachołkowski A, Jacobs PM, Jancurová L, Jang HJ, Jangal S, Janik MA, Janik R, Jayarathna PHSY, Jena S, Jimenez Bustamante RT, Jirden L, Jones PG, Jung H, Jusko A, Kaidalov AB, Kakoyan V, Kalcher S, Kaliňák P, Kalisky M, Kalliokoski T, Kalweit A, Kanaki K, Kang JH, Kaplin V, Karasu Uysal A, Karavichev O, Karavicheva T, Karpechev E, Kazantsev A, Kebschull U, Keidel R, Khan MM, Khan SA, Khan P, Khanzadeev A, Kharlov Y, Kileng B, Kim M, Kim JS, Kim DJ, Kim T, Kim B, Kim S, Kim SH, Kim DW, Kim JH, Kirsch S, Kisel I, Kiselev S, Kisiel A, Klay JL, Klein J, Klein-Bösing C, Kliemant M, Kluge A, Knichel ML, Knospe AG, Koch K, Köhler MK, Kolojvari A, Kondratiev V, Kondratyeva N, Konevskikh A, Korneev A, Kottachchi Kankanamge Don C, Kour R, Kowalski M, Kox S, Koyithatta Meethaleveedu G, Kral J, Králik I, Kramer F, Kraus I, Krawutschke T, Krelina M, Kretz M, Krivda M, Krizek F, Krus M, Kryshen E, Krzewicki M, Kucheriaev Y, Kuhn C, Kuijer PG, Kurashvili P, Kurepin A, Kurepin AB, Kuryakin A, Kushpil S, Kushpil V, Kvaerno H, Kweon MJ, Kwon Y, Ladrón de Guevara P, Lakomov I, Langoy R, Lara C, Lardeux A, La Rocca P, Lazzeroni C, Lea R, Le Bornec Y, Lee SC, Lee KS, Lefèvre F, Lehnert J, Leistam L, Lenhardt M, Lenti V, León H, León Monzón I, León Vargas H, Lévai P, Lien J, Lietava R, Lindal S, Lindenstruth V, Lippmann C, Lisa MA, Liu L, Loenne PI, Loggins VR, Loginov V, Lohn S, Lohner D, Loizides C, Loo KK, Lopez X, López Torres E, Løvhøiden G, Lu XG, Luettig P, Lunardon M, Luo J, Luparello G, Luquin L, Luzzi C, Ma K, Ma R, Madagodahettige-Don DM, Maevskaya A, Mager M, Mahapatra DP, Maire A, Malaev M, Maldonado Cervantes I, Malinina L, Mal'kevich D, Malzacher P, Mamonov A, Manceau L, Mangotra L, Manko V, Manso F, Manzari V, Mao Y, Marchisone M, Mareš J, Margagliotti GV, Margotti A, Marín A, Marin Tobon CA, Markert C, Martashvili I, Martinengo P, Martínez MI, Martínez Davalos A, Martínez García G, Martynov Y, Mas A, Masciocchi S, Masera M, Masoni A, Massacrier L, Mastromarco M, Mastroserio A, Matthews ZL, Matyja A, Mayani D, Mayer C, Mazer J, Mazzoni MA, Meddi F, Menchaca-Rocha A, Mercado Pérez J, Meres M, Miake Y, Milano L, Milosevic J, Mischke A, Mishra AN, Miśkowiec D, Mitu C, Mlynarz J, Mohanty AK, Mohanty B, Molnar L, Montaño Zetina L, Monteno M, Montes E, Moon T, Morando M, Moreira De Godoy DA, Moretto S, Morsch A, Muccifora V, Mudnic E, Muhuri S, Müller H, Munhoz MG, Musa L, Musso A, Nandi BK, Nania R, Nappi E, Nattrass C, Naumov NP, Navin S, Nayak TK, Nazarenko S, Nazarov G, Nedosekin A, Nicassio M, Nielsen BS, Niida T, Nikolaev S, Nikolic V, Nikulin V, Nikulin S, Nilsen BS, Nilsson MS, Noferini F, Nomokonov P, Nooren G, Novitzky N, Nyanin A, Nyatha A, Nygaard C, Nystrand J, Ochirov A, Oeschler H, Oh SK, Oh S, Oleniacz J, Oppedisano C, Ortiz Velasquez A, Ortona G, Oskarsson A, Ostrowski P, Otwinowski J, Oyama K, Ozawa K, Pachmayer Y, Pachr M, Padilla F, Pagano P, Paić G, Painke F, Pajares C, Pal SK, Pal S, Palaha A, Palmeri A, Papikyan V, Pappalardo GS, Park WJ, Passfeld A, Pastirčák B, Patalakha DI, Paticchio V, Pavlinov A, Pawlak T, Peitzmann T, Pereira De Oliveira Filho E, Peresunko D, Pérez Lara CE, Perez Lezama E, Perini D, Perrino D, Peryt W, Pesci A, Peskov V, Pestov Y, Petráček V, Petran M, Petris M, Petrov P, Petrovici M, Petta C, Piano S, Piccotti A, Pikna M, Pillot P, Pinazza O, Pinsky L, Pitz N, Piuz F, Piyarathna DB, Płoskoń M, Pluta J, Pocheptsov T, Pochybova S, Podesta-Lerma PLM, Poghosyan MG, Polák K, Polichtchouk B, Pop A, Porteboeuf-Houssais S, Pospíšil V, Potukuchi B, Prasad SK, Preghenella R, Prino F, Pruneau CA, Pshenichnov I, Puchagin S, Puddu G, Pujol Teixido J, Pulvirenti A, Punin V, Putiš M, Putschke J, Quercigh E, Qvigstad H, Rachevski A, Rademakers A, Radomski S, Räihä TS, Rak J, Rakotozafindrabe A, Ramello L, Ramírez Reyes A, Raniwala S, Raniwala R, Räsänen SS, Rascanu BT, Rathee D, Read KF, Real JS, Redlich K, Reichelt P, Reicher M, Renfordt R, Reolon AR, Reshetin A, Rettig F, Revol JP, Reygers K, Riccati L, Ricci RA, Richert T, Richter M, Riedler P, Riegler W, Riggi F, Rodríguez Cahuantzi M, Røed K, Rohr D, Röhrich D, Romita R, Ronchetti F, Rosnet P, Rossegger S, Rossi A, Roukoutakis F, Roy C, Roy P, Rubio Montero AJ, Rui R, Ryabinkin E, Rybicki A, Sadovsky S, Safařík K, Sahoo R, Sahu PK, Saini J, Sakaguchi H, Sakai S, Sakata D, Salgado CA, Salzwedel J, Sambyal S, Samsonov V, Sanchez Castro X, Sándor L, Sandoval A, Sano S, Sano M, Santo R, Santoro R, Sarkamo J, Scapparone E, Scarlassara F, Scharenberg RP, Schiaua C, Schicker R, Schmidt HR, Schmidt C, Schreiner S, Schuchmann S, Schukraft J, Schutz Y, Schwarz K, Schweda K, Scioli G, Scomparin E, Scott PA, Scott R, Segato G, Selyuzhenkov I, Senyukov S, Seo J, Serci S, Serradilla E, Sevcenco A, Sgura I, Shabetai A, Shabratova G, Shahoyan R, Sharma N, Sharma S, Shigaki K, Shimomura M, Shtejer K, Sibiriak Y, Siciliano M, Sicking E, Siddhanta S, Siemiarczuk T, Silvermyr D, Silvestre C, Simonetti G, Singaraju R, Singh R, Singha S, Sinha T, Sinha BC, Sitar B, Sitta M, Skaali TB, Skjerdal K, Smakal R, Smirnov N, Snellings RJM, Søgaard C, Soltz R, Son H, Song M, Song J, Soos C, Soramel F, Sputowska I, Spyropoulou-Stassinaki M, Srivastava BK, Stachel J, Stan I, Stan I, Stefanek G, Stefanini G, Steinbeck T, Steinpreis M, Stenlund E, Steyn G, Stocco D, Stolpovskiy M, Strabykin K, Strmen P, Suaide AAP, Subieta Vásquez MA, Sugitate T, Suire C, Sukhorukov M, Sultanov R, Sumbera M, Susa T, Szanto de Toledo A, Szarka I, Szostak A, Tagridis C, Takahashi J, Tapia Takaki JD, Tauro A, Tejeda Muñoz G, Telesca A, Terrevoli C, Thäder J, Thomas D, Tieulent R, Timmins AR, Tlusty D, Toia A, Torii H, Toscano L, Tosello F, Truesdale D, Trzaska WH, Tsuji T, Tumkin A, Turrisi R, Tveter TS, Ulery J, Ullaland K, Ulrich J, Uras A, Urbán J, Urciuoli GM, Usai GL, Vajzer M, Vala M, Valencia Palomo L, Vallero S, van der Kolk N, Vande Vyvre P, van Leeuwen M, Vannucci L, Vargas A, Varma R, Vasileiou M, Vasiliev A, Vechernin V, Veldhoen M, Venaruzzo M, Vercellin E, Vergara S, Vernekohl DC, Vernet R, Verweij M, Vickovic L, Viesti G, Vikhlyantsev O, Vilakazi Z, Villalobos Baillie O, Vinogradov A, Vinogradov Y, Vinogradov L, Virgili T, Viyogi YP, Vodopyanov A, Voloshin S, Voloshin K, Volpe G, von Haller B, Vranic D, Ovrebekk G, Vrláková J, Vulpescu B, Vyushin A, Wagner B, Wagner V, Wan R, Wang Y, Wang D, Wang Y, Wang M, Watanabe K, Wessels JP, Westerhoff U, Wiechula J, Wikne J, Wilde M, Wilk G, Wilk A, Williams MCS, Windelband B, Xaplanteris Karampatsos L, Yang H, Yang S, Yasnopolskiy S, Yi J, Yin Z, Yokoyama H, Yoo IK, Yoon J, Yu W, Yuan X, Yushmanov I, Zach C, Zampolli C, Zaporozhets S, Zarochentsev A, Závada P, Zaviyalov N, Zbroszczyk H, Zelnicek P, Zgura IS, Zhalov M, Zhang X, Zhou D, Zhou Y, Zhou F, Zhu X, Zichichi A, Zimmermann A, Zinovjev G, Zoccarato Y, Zynovyev M. J/ψ suppression at forward rapidity in Pb-Pb collisions at √s(NN) = 2.76 TeV. PHYSICAL REVIEW LETTERS 2012; 109:072301. [PMID: 23006362 DOI: 10.1103/physrevlett.109.072301] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Indexed: 06/01/2023]
Abstract
The ALICE experiment has measured the inclusive J/ψ production in Pb-Pb collisions at √s(NN) = 2.76 TeV down to zero transverse momentum in the rapidity range 2.5 < y < 4. A suppression of the inclusive J/ψ yield in Pb-Pb is observed with respect to the one measured in pp collisions scaled by the number of binary nucleon-nucleon collisions. The nuclear modification factor, integrated over the 0%-80% most central collisions, is 0.545 ± 0.032(stat) ± 0.083(syst) and does not exhibit a significant dependence on the collision centrality. These features appear significantly different from measurements at lower collision energies. Models including J/ψ production from charm quarks in a deconfined partonic phase can describe our data.
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Aamodt K, Abelev B, Abrahantes Quintana A, Adamová D, Adare AM, Aggarwal MM, Aglieri Rinella G, Agocs AG, Agostinelli A, Aguilar Salazar S, Ahammed Z, Ahmad N, Ahmad Masoodi A, Ahn SU, Akindinov A, Aleksandrov D, Alessandro B, Alfaro Molina R, Alici A, Alkin A, Almaráz Aviña E, Alme J, Alt T, Altini V, Altinpinar S, Altsybeev I, Andrei C, Andronic A, Anguelov V, Anielski J, Antičić T, Antinori F, Antonioli P, Aphecetche L, Appelshäuser H, Arbor N, Arcelli S, Arend A, Armesto N, Arnaldi R, Aronsson T, Arsene IC, Arslandok M, Asryan A, Augustinus A, Averbeck R, Awes TC, Äystö J, Azmi MD, Bach M, Badalà A, Baek YW, Bailhache R, Bala R, Baldini Ferroli R, Baldisseri A, Baldit A, Baltasar Dos Santos Pedrosa F, Bán J, Baral RC, Barbera R, Barile F, Barnaföldi GG, Barnby LS, Barret V, Bartke J, Basile M, Bastid N, Bathen B, Batigne G, Batyunya B, Baumann C, Bearden IG, Beck H, Belikov I, Bellini F, Bellwied R, Belmont-Moreno E, Beole S, Berceanu I, Bercuci A, Berdnikov Y, Berenyi D, Bergmann C, Betev L, Bhasin A, Bhati AK, Bianchi L, Bianchi N, Bianchin C, Bielčík J, Bielčíková J, Bilandzic A, Biolcati E, Blanco F, Blanco F, Blau D, Blume C, Bock N, Bogdanov A, Bøggild H, Bogolyubsky M, Boldizsár L, Bombara M, Bombonati C, Book J, Borel H, Borissov A, Bortolin C, Bose S, Bossú F, Botje M, Böttger S, Boyer B, Braun-Munzinger P, Bregant M, Breitner T, Broz M, Brun R, Bruna E, Bruno GE, Budnikov D, Buesching H, Bufalino S, Bugaiev K, Busch O, Buthelezi Z, Caffarri D, Cai X, Caines H, Calvo Villar E, Camerini P, Canoa Roman V, Cara Romeo G, Carena F, Carena W, Carminati F, Casanova Díaz A, Caselle M, Castillo Castellanos J, Casula EAR, Catanescu V, Cavicchioli C, Cepila J, Cerello P, Chang B, Chapeland S, Charvet JL, Chattopadhyay S, Chattopadhyay S, Cherney M, Cheshkov C, Cheynis B, Chiavassa E, Chibante Barroso V, Chinellato DD, Chochula P, Chojnacki M, Christakoglou P, Christensen CH, Christiansen P, Chujo T, Chung SU, Cicalo C, Cifarelli L, Cindolo F, Cleymans J, Coccetti F, Coffin JP, Colamaria F, Colella D, Conesa Balbastre G, Conesa del Valle Z, Constantin P, Contin G, Contreras JG, Cormier TM, Corrales Morales Y, Cortés Maldonado I, Cortese P, Cosentino MR, Costa F, Cotallo ME, Crochet P, Cruz Alaniz E, Cuautle E, Cunqueiro L, Erasmo GD, Dainese A, Dalsgaard HH, Danu A, Das D, Das I, Das K, Dash A, Dash S, De S, De Azevedo Moregula A, de Barros GOV, De Caro A, de Cataldo G, de Cuveland J, De Falco A, De Gruttola D, De Marco N, De Pasquale S, de Rooij R, Del Castillo Sanchez E, Delagrange H, Deloff A, Demanov V, Dénes E, Deppman A, Di Bari D, Di Giglio C, Di Liberto S, Di Mauro A, Di Nezza P, Dietel T, Divià R, Djuvsland Ø, Dobrin A, Dobrowolski T, Domínguez I, Dönigus B, Dordic O, Driga O, Dubey AK, Ducroux L, Dupieux P, Dutta Majumdar AK, Dutta Majumdar MR, Elia D, Emschermann D, Engel H, Erdal HA, Espagnon B, Estienne M, Esumi S, Evans D, Eyyubova G, Fabris D, Faivre J, Falchieri D, Fantoni A, Fasel M, Fearick R, Fedunov A, Fehlker D, Felea D, Fenton-Olsen B, Feofilov G, Fernández Téllez A, Ferreiro EG, Ferretti A, Ferretti R, Figiel J, Figueredo MAS, Filchagin S, Fini R, Finogeev D, Fionda FM, Fiore EM, Floris M, Foertsch S, Foka P, Fokin S, Fragiacomo E, Fragkiadakis M, Frankenfeld U, Fuchs U, Furget C, Fusco Girard M, Gaardhøje JJ, Gagliardi M, Gago A, Gallio M, Gangadharan DR, Ganoti P, Garabatos C, Garcia-Solis E, Garishvili I, Gerhard J, Germain M, Geuna C, Gheata A, Gheata M, Ghidini B, Ghosh P, Gianotti P, Girard MR, Giubellino P, Gladysz-Dziadus E, Glässel P, Gomez R, González-Trueba LH, González-Zamora P, Gorbunov S, Goswami A, Gotovac S, Grabski V, Graczykowski LK, Grajcarek R, Grelli A, Grigoras A, Grigoras C, Grigoriev V, Grigoryan A, Grigoryan S, Grinyov B, Grion N, Grosse-Oetringhaus JF, Grossiord JY, Guber F, Guernane R, Guerra Gutierrez C, Guerzoni B, Guilbaud M, Gulbrandsen K, Gunji T, Gupta A, Gupta R, Gutbrod H, Haaland Ø, Hadjidakis C, Haiduc M, Hamagaki H, Hamar G, Hanratty LD, Harmanova Z, Harris JW, Hartig M, Hasegan D, Hatzifotiadou D, Hayrapetyan A, Heide M, Helstrup H, Herghelegiu A, Herrera Corral G, Herrmann N, Hetland KF, Hicks B, Hille PT, Hippolyte B, Horaguchi T, Hori Y, Hristov P, Hřivnáčová I, Huang M, Huber S, Humanic TJ, Hwang DS, Ichou R, Ilkaev R, Ilkiv I, Inaba M, Incani E, Innocenti GM, Ippolitov M, Irfan M, Ivan C, Ivanov A, Ivanov M, Ivanov V, Ivanytskyi O, Jacobs PM, Jancurová L, Jangal S, Janik MA, Janik R, Jayarathna PHSY, Jena S, Jimenez Bustamante RT, Jirden L, Jones PG, Jung H, Jung W, Jusko A, Kalcher S, Kaliňák P, Kalisky M, Kalliokoski T, Kalweit A, Kanaki K, Kang JH, Kaplin V, Karasu Uysal A, Karavichev O, Karavicheva T, Karpechev E, Kazantsev A, Kebschull U, Keidel R, Khan MM, Khan P, Khan SA, Khanzadeev A, Kharlov Y, Kileng B, Kim B, Kim DJ, Kim DW, Kim JH, Kim JS, Kim M, Kim S, Kim SH, Kim T, Kirsch S, Kisel I, Kiselev S, Kisiel A, Klay JL, Klein J, Klein-Bösing C, Kliemant M, Kluge A, Knichel ML, Koch K, Köhler MK, Kolojvari A, Kondratiev V, Kondratyeva N, Konevskikh A, Kottachchi Kankanamg Don C, Kour R, Kowalski M, Kox S, Koyithatta Meethaleveedu G, Kral J, Králik I, Kramer F, Kraus I, Krawutschke T, Kretz M, Krivda M, Krizek F, Krus M, Kryshen E, Krzewicki M, Kucheriaev Y, Kuhn C, Kuijer PG, Kurashvili P, Kurepin A, Kurepin AB, Kuryakin A, Kushpil S, Kushpil V, Kweon MJ, Kwon Y, La Rocca P, Ladrón de Guevara P, Lakomov I, Lara C, Lardeux A, Larsen DT, Lazzeroni C, Le Bornec Y, Lea R, Lechman M, Lee KS, Lee SC, Lefèvre F, Lehnert J, Leistam L, Lenhardt M, Lenti V, León Monzón I, León Vargas H, Lévai P, Li X, Lien J, Lietava R, Lindal S, Lindenstruth V, Lippmann C, Lisa MA, Liu L, Loenne PI, Loggins VR, Loginov V, Lohn S, Lohner D, Loizides C, Loo KK, Lopez X, López Torres E, Løvhøiden G, Lu XG, Luettig P, Lunardon M, Luo J, Luparello G, Luquin L, Luzzi C, Ma R, Maevskaya A, Mager M, Mahapatra DP, Maire A, Malaev M, Maldonado Cervantes I, Malinina L, Mal'Kevich D, Malzacher P, Mamonov A, Manceau L, Manko V, Manso F, Manzari V, Mao Y, Marchisone M, Mareš J, Margagliotti GV, Margotti A, Marín A, Markert C, Martashvili I, Martinengo P, Martínez MI, Martínez Davalos A, Martínez García G, Martynov Y, Mas A, Masciocchi S, Masera M, Masoni A, Massacrier L, Mastromarco M, Mastroserio A, Matthews ZL, Matyja A, Mayani D, Mayer C, Mazzoni MA, Meddi F, Menchaca-Rocha A, Mercado Pérez J, Meres M, Miake Y, Michalon A, Midori J, Milano L, Milosevic J, Mischke A, Mishra AN, Miśkowiec D, Mitu C, Mlynarz J, Mohanty AK, Mohanty B, Molnar L, Montaño Zetina L, Monteno M, Montes E, Moon T, Morando M, Moreira De Godoy DA, Moretto S, Morsch A, Muccifora V, Mudnic E, Müller H, Muhuri S, Munhoz MG, Musa L, Musso A, Nandi BK, Nania R, Nappi E, Nattrass C, Naumov NP, Navin S, Nayak TK, Nazarenko S, Nazarov G, Nedosekin A, Nicassio M, Nielsen BS, Niida T, Nikolaev S, Nikolic V, Nikulin S, Nikulin V, Nilsen BS, Nilsson MS, Noferini F, Nomokonov P, Nooren G, Novitzky N, Nyanin A, Nyatha A, Nygaard C, Nystrand J, Obayashi H, Ochirov A, Oeschler H, Oh SK, Oleniacz J, Oppedisano C, Ortiz Velasquez A, Ortona G, Oskarsson A, Otterlund I, Otwinowski J, Øvrebekk G, Oyama K, Pachmayer Y, Pachr M, Padilla F, Pagano P, Paić G, Painke F, Pajares C, Pal S, Pal SK, Palaha A, Palmeri A, Pappalardo GS, Park WJ, Passfeld A, Patalakha DI, Paticchio V, Pavlinov A, Pawlak T, Peitzmann T, Pereira De Oliveira Filho E, Peresunko D, Pérez Lara CE, Perez Lezama E, Perini D, Perrino D, Peryt W, Pesci A, Peskov V, Pestov Y, Petráček V, Petran M, Petris M, Petrov P, Petrovici M, Petta C, Piano S, Piccotti A, Pikna M, Pillot P, Pinazza O, Pinsky L, Pitz N, Piuz F, Piyarathna DB, Płoskoń M, Pluta J, Pocheptsov T, Pochybova S, Podesta-Lerma PLM, Poghosyan MG, Polichtchouk B, Pop A, Porteboeuf-Houssais S, Pospíšil V, Potukuchi B, Prasad SK, Preghenella R, Prino F, Pruneau CA, Pshenichnov I, Puddu G, Pulvirenti A, Punin V, Putiš M, Putschke J, Quercigh E, Qvigstad H, Rachevski A, Rademakers A, Radomski S, Räihä TS, Rak J, Rakotozafindrabe A, Ramello L, Ramírez Reyes A, Raniwala R, Raniwala S, Räsänen SS, Rascanu BT, Rathee D, Read KF, Real JS, Redlich K, Reichelt P, Reicher M, Renfordt R, Reolon AR, Reshetin A, Rettig F, Revol JP, Reygers K, Ricaud H, Riccati L, Ricci RA, Richter M, Riedler P, Riegler W, Riggi F, Rodríguez Cahuantzi M, Rohr D, Röhrich D, Romita R, Ronchetti F, Rosnet P, Rossegger S, Rossi A, Roukoutakis F, Roy C, Roy P, Rubio Montero AJ, Rui R, Ryabinkin E, Rybicki A, Sadovsky S, Šafařík K, Sahu PK, Saini J, Sakaguchi H, Sakai S, Sakata D, Salgado CA, Sambyal S, Samsonov V, Sanchez Castro X, Šándor L, Sandoval A, Sano M, Sano S, Santo R, Santoro R, Sarkamo J, Scapparone E, Scarlassara F, Scharenberg RP, Schiaua C, Schicker R, Schmidt C, Schmidt HR, Schreiner S, Schuchmann S, Schukraft J, Schutz Y, Schwarz K, Schweda K, Scioli G, Scomparin E, Scott PA, Scott R, Segato G, Selyuzhenkov I, Senyukov S, Serci S, Serradilla E, Sevcenco A, Sgura I, Shabratova G, Shahoyan R, Sharma N, Sharma S, Shigaki K, Shimomura M, Shtejer K, Sibiriak Y, Siciliano M, Sicking E, Siddhanta S, Siemiarczuk T, Silvermyr D, Simonetti G, Singaraju R, Singh R, Singha S, Sinha BC, Sinha T, Sitar B, Sitta M, Skaali TB, Skjerdal K, Smakal R, Smirnov N, Snellings R, Søgaard C, Soltz R, Son H, Song J, Song M, Soos C, Soramel F, Spyropoulou-Stassinaki M, Srivastava BK, Stachel J, Stan I, Stefanek G, Stefanini G, Steinbeck T, Steinpreis M, Stenlund E, Steyn G, Stocco D, Stolpovskiy M, Strmen P, Suaide AAP, Subieta Vásquez MA, Sugitate T, Suire C, Sukhorukov M, Sultanov R, Šumbera M, Susa T, Szanto de Toledo A, Szarka I, Szostak A, Tagridis C, Takahashi J, Tapia Takaki JD, Tauro A, Tejeda Muñoz G, Telesca A, Terrevoli C, Thäder J, Thomas D, Thomas JH, Tieulent R, Timmins AR, Tlusty D, Toia A, Torii H, Tosello F, Traczyk T, Trzaska WH, Tsuji T, Tumkin A, Turrisi R, Turvey AJ, Tveter TS, Ulery J, Ullaland K, Ulrich J, Uras A, Urbán J, Urciuoli GM, Usai GL, Vajzer M, Vala M, Valencia Palomo L, Vallero S, van der Kolk N, van Leeuwen M, Vande Vyvre P, Vannucci L, Vargas A, Varma R, Vasileiou M, Vasiliev A, Vechernin V, Veldhoen M, Venaruzzo M, Vercellin E, Vergara S, Vernekohl DC, Vernet R, Verweij M, Vickovic L, Viesti G, Vikhlyantsev O, Vilakazi Z, Villalobos Baillie O, Vinogradov A, Vinogradov L, Vinogradov Y, Virgili T, Viyogi YP, Vodopyanov A, Voloshin K, Voloshin S, Volpe G, von Haller B, Vranic D, Vrláková J, Vulpescu B, Vyushin A, Wagner B, Wagner V, Wan R, Wang D, Wang M, Wang Y, Wang Y, Watanabe K, Wessels JP, Westerhoff U, Wiechula J, Wikne J, Wilde M, Wilk A, Wilk G, Williams MCS, Windelband B, Xaplanteris Karampatsos L, Yang H, Yasnopolskiy S, Yi J, Yin Z, Yokoyama H, Yoo IK, Yoon J, Yu W, Yuan X, Yushmanov I, Zach C, Zampolli C, Zaporozhets S, Zarochentsev A, Závada P, Zaviyalov N, Zbroszczyk H, Zelnicek P, Zgura I, Zhalov M, Zhang X, Zhou D, Zhou F, Zhou Y, Zhu X, Zichichi A, Zimmermann A, Zinovjev G, Zoccarato Y, Zynovyev M. Particle-yield modification in jetlike azimuthal dihadron correlations in Pb-Pb collisions at √s(NN)=2.76 TeV. PHYSICAL REVIEW LETTERS 2012; 108:092301. [PMID: 22463626 DOI: 10.1103/physrevlett.108.092301] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Indexed: 05/31/2023]
Abstract
The yield of charged particles associated with high-p(t) trigger particles (8<p(t)<15 GeV/c) is measured with the ALICE detector in Pb-Pb collisions at √s(NN)=2.76 TeV relative to proton-proton collisions at the same energy. The conditional per-trigger yields are extracted from the narrow jetlike correlation peaks in azimuthal dihadron correlations. In the 5% most central collisions, we observe that the yield of associated charged particles with transverse momenta p(t)>3 GeV/c on the away side drops to about 60% of that observed in pp collisions, while on the near side a moderate enhancement of 20%-30% is found.
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Abelev B, Abrahantes Quintana A, Adamová D, Adare AM, Aggarwal MM, Aglieri Rinella G, Agocs AG, Agostinelli A, Aguilar Salazar S, Ahammed Z, Ahmad N, Ahmad Masoodi A, Ahn SU, Akindinov A, Aleksandrov D, Alessandro B, AlfaroMolina R, Alici A, Alkin A, Almaráz Aviña E, Alt T, Altini V, Altinpinar S, Altsybeev I, Andrei C, Andronic A, Anguelov V, Anson C, Antičić T, Antinori F, Antonioli P, Aphecetche L, Appelshäuser H, Arbor N, Arcelli S, Arend A, Armesto N, Arnaldi R, Aronsson T, Arsene IC, Arslandok M, Asryan A, Augustinus A, Averbeck R, Awes TC, Aystö J, Azmi MD, Bach M, Badalà A, Baek YW, Bailhache R, Bala R, Baldini Ferroli R, Baldisseri A, Baldit A, Baltasar Dos Santos Pedrosa F, Bán J, Baral RC, Barbera R, Barile F, Barnaföldi GG, Barnby LS, Barret V, Bartke J, Basile M, Bastid N, Bathen B, Batigne G, Batyunya B, Baumann C, Bearden IG, Beck H, Belikov I, Bellini F, Bellwied R, Belmont-Moreno E, Beole S, Berceanu I, Bercuci A, Berdnikov Y, Berenyi D, Bergmann C, Berzano D, Betev L, Bhasin A, Bhati AK, Bianchi N, Bianchi L, Bianchin C, Bielčík J, Bielčíková J, Bilandzic A, Blanco F, Blanco F, Blau D, Blume C, Boccioli M, Bock N, Bogdanov A, Bøggild H, Bogolyubsky M, Boldizsár L, Bombara M, Book J, Borel H, Borissov A, Bortolin C, Bose S, Bossú F, Botje M, Böttger S, Boyer B, Braun-Munzinger P, Bregant M, Breitner T, Broz M, Brun R, Bruna E, Bruno GE, Budnikov D, Buesching H, Bufalino S, Bugaiev K, Busch O, Buthelezi Z, Caffarri D, Cai X, Caines H, Calvo Villar E, Camerini P, Canoa Roman V, Cara Romeo G, Carena W, Carena F, Carlin Filho N, Carminati F, Carrillo Montoya CA, Casanova Díaz A, Caselle M, Castillo Castellanos J, Castillo Hernandez JF, Casula EAR, Catanescu V, Cavicchioli C, Cepila J, Cerello P, Chang B, Chapeland S, Charvet JL, Chattopadhyay S, Chattopadhyay S, Cherney M, Cheshkov C, Cheynis B, Chiavassa E, Chibante Barroso V, Chinellato DD, Chochula P, Chojnacki M, Christakoglou P, Christensen CH, Christiansen P, Chujo T, Chung SU, Cicalò C, Cifarelli L, Cindolo F, Cleymans J, Coccetti F, Coffin JP, Colamaria F, Colella D, Conesa Balbastre G, Conesa del Valle Z, Constantin P, Contin G, Contreras JG, Cormier TM, Corrales Morales Y, Cortese P, Cortés Maldonado I, Cosentino MR, Costa F, Cotallo ME, Crescio E, Crochet P, Cruz Alaniz E, Cuautle E, Cunqueiro L, Dainese A, Dalsgaard HH, Danu A, Das D, Das I, Das K, Dash S, Dash A, De S, De Azevedo Moregula A, de Barros GOV, De Caro A, de Cataldo G, de Cuveland J, De Falco A, De Gruttola D, Delagrange H, Del Castillo Sanchez E, Deloff A, Demanov V, De Marco N, Dénes E, De Pasquale S, Deppman A, D'Erasmo G, de Rooij R, Di Bari D, Dietel T, Di Giglio C, Di Liberto S, Di Mauro A, Di Nezza P, Divià R, Djuvsland Ø, Dobrin A, Dobrowolski T, Domínguez I, Dönigus B, Dordic O, Driga O, Dubey AK, Ducroux L, Dupieux P, Dutta Majumdar MR, Dutta Majumdar AK, Elia D, Emschermann D, Engel H, Erdal HA, Espagnon B, Estienne M, Esumi S, Evans D, Eyyubova G, Fabris D, Faivre J, Falchieri D, Fantoni A, Fasel M, Fearick R, Fedunov A, Fehlker D, Feldkamp L, Felea D, Feofilov G, Fernández Téllez A, Ferreiro EG, Ferretti A, Ferretti R, Figiel J, Figueredo MAS, Filchagin S, Fini R, Finogeev D, Fionda FM, Fiore EM, Floris M, Foertsch S, Foka P, Fokin S, Fragiacomo E, Fragkiadakis M, Frankenfeld U, Fuchs U, Furget C, Fusco Girard M, Gaardhøje JJ, Gagliardi M, Gago A, Gallio M, Gangadharan DR, Ganoti P, Garabatos C, Garcia-Solis E, Garishvili I, Gerhard J, Germain M, Geuna C, Gheata A, Gheata M, Ghidini B, Ghosh P, Gianotti P, Girard MR, Giubellino P, Gladysz-Dziadus E, Glässel P, Gomez R, González-Trueba LH, González-Zamora P, Gorbunov S, Goswami A, Gotovac S, Grabski V, Graczykowski LK, Grajcarek R, Grelli A, Grigoras A, Grigoras C, Grigoriev V, Grigoryan S, Grigoryan A, Grinyov B, Grion N, Gros P, Grosse-Oetringhaus JF, Grossiord JY, Grosso R, Guber F, Guernane R, Guerra Gutierrez C, Guerzoni B, Guilbaud M, Gulbrandsen K, Gunji T, Gupta A, Gupta R, Gutbrod H, Haaland Ø, Hadjidakis C, Haiduc M, Hamagaki H, Hamar G, Han BH, Hanratty LD, Hansen A, Harmanova Z, Harris JW, Hartig M, Hasegan D, Hatzifotiadou D, Hayrapetyan A, Heide M, Helstrup H, Herghelegiu A, Herrera Corral G, Herrmann N, Hetland KF, Hicks B, Hille PT, Hippolyte B, Horaguchi T, Hori Y, Hristov P, Hřivnáčová I, Huang M, Huber S, Humanic TJ, Hwang DS, Ichou R, Ilkaev R, Ilkiv I, Inaba M, Incani E, Innocenti PG, Innocenti GM, Ippolitov M, Irfan M, Ivan C, Ivanov A, Ivanov M, Ivanov V, Ivanytskyi O, Jachołkowski A, Jacobs PM, Jancurová L, Jangal S, Janik MA, Janik R, Jayarathna PHSY, Jena S, Jimenez Bustamante RT, Jirden L, Jones PG, Jung H, Jung W, Jusko A, Kaidalov AB, Kakoyan V, Kalcher S, Kaliňák P, Kalisky M, Kalliokoski T, Kalweit A, Kanaki K, Kang JH, Kaplin V, Karasu Uysal A, Karavichev O, Karavicheva T, Karpechev E, Kazantsev A, Kebschull U, Keidel R, Khan MM, Khan SA, Khan P, Khanzadeev A, Kharlov Y, Kileng B, Kim S, Kim DW, Kim JH, Kim JS, Kim M, Kim SH, Kim T, Kim B, Kim DJ, Kirsch S, Kisel I, Kiselev S, Kisiel A, Klay JL, Klein J, Klein-Bösing C, Kliemant M, Kluge A, Knichel ML, Koch K, Köhler MK, Kolojvari A, Kondratiev V, Kondratyeva N, Konevskikh A, Kottachchi Kankanamge Don C, Kour R, Kowalski M, Kox S, Koyithatta Meethaleveedu G, Kral J, Králik I, Kramer F, Kraus I, Krawutschke T, Kretz M, Krivda M, Krizek F, Krus M, Kryshen E, Krzewicki M, Kucheriaev Y, Kuhn C, Kuijer PG, Kurashvili P, Kurepin AB, Kurepin A, Kuryakin A, Kushpil V, Kushpil S, Kvaerno H, Kweon MJ, Kwon Y, Ladrón de Guevara P, Lakomov I, Langoy R, Lara C, Lardeux A, La Rocca P, Larsen DT, Lazzeroni C, Lea R, Le Bornec Y, Lee SC, Lee KS, Lefèvre F, Lehnert J, Leistam L, Lenhardt M, Lenti V, León H, León Monzón I, León Vargas H, Lévai P, Li X, Lien J, Lietava R, Lindal S, Lindenstruth V, Lippmann C, Lisa MA, Liu L, Loenne PI, Loggins VR, Loginov V, Lohn S, Lohner D, Loizides C, Loo KK, Lopez X, López Torres E, Løvhøiden G, Lu XG, Luettig P, Lunardon M, Luo J, Luparello G, Luquin L, Luzzi C, Ma R, Ma K, Madagodahettige-Don DM, Maevskaya A, Mager M, Mahapatra DP, Maire A, Malaev M, Maldonado Cervantes I, Malinina L, Mal'Kevich D, Malzacher P, Mamonov A, Manceau L, Mangotra L, Manko V, Manso F, Manzari V, Mao Y, Marchisone M, Mareš J, Margagliotti GV, Margotti A, Marín A, Markert C, Martashvili I, Martinengo P, Martínez MI, Martínez Davalos A, Martínez García G, Martynov Y, Mas A, Masciocchi S, Masera M, Masoni A, Massacrier L, Mastromarco M, Mastroserio A, Matthews ZL, Matyja A, Mayani D, Mayer C, Mazzoni MA, Meddi F, Menchaca-Rocha A, Mercado Pérez J, Meres M, Miake Y, Michalon A, Midori J, Milano L, Milosevic J, Mischke A, Mishra AN, Miśkowiec D, Mitu C, Mlynarz J, Mohanty AK, Mohanty B, Molnar L, Montaño Zetina L, Monteno M, Montes E, Moon T, Morando M, Moreira De Godoy DA, Moretto S, Morsch A, Muccifora V, Mudnic E, Muhuri S, Müller H, Munhoz MG, Musa L, Musso A, Nandi BK, Nania R, Nappi E, Nattrass C, Naumov NP, Navin S, Nayak TK, Nazarenko S, Nazarov G, Nedosekin A, Nicassio M, Nielsen BS, Niida T, Nikolaev S, Nikolic V, Nikulin V, Nikulin S, Nilsen BS, Nilsson MS, Noferini F, Nomokonov P, Nooren G, Novitzky N, Nyanin A, Nyatha A, Nygaard C, Nystrand J, Obayashi H, Ochirov A, Oeschler H, Oh SK, Oleniacz J, Oppedisano C, Ortiz Velasquez A, Ortona G, Oskarsson A, Ostrowski P, Otterlund I, Otwinowski J, Øvrebekk G, Oyama K, Ozawa K, Pachmayer Y, Pachr M, Padilla F, Pagano P, Paić G, Painke F, Pajares C, Pal S, Pal SK, Palaha A, Palmeri A, Papikyan V, Pappalardo GS, Park WJ, Passfeld A, Pastirčák B, Patalakha DI, Paticchio V, Pavlinov A, Pawlak T, Peitzmann T, Perales M, Pereira De Oliveira Filho E, Peresunko D, Pérez Lara CE, Perez Lezama E, Perini D, Perrino D, Peryt W, Pesci A, Peskov V, Pestov Y, Petráček V, Petran M, Petris M, Petrov P, Petrovici M, Petta C, Piano S, Piccotti A, Pikna M, Pillot P, Pinazza O, Pinsky L, Pitz N, Piuz F, Piyarathna DB, Płoskoń M, Pluta J, Pocheptsov T, Pochybova S, Podesta-Lerma PLM, Poghosyan MG, Polák K, Polichtchouk B, Pop A, Porteboeuf-Houssais S, Pospíšil V, Potukuchi B, Prasad SK, Preghenella R, Prino F, Pruneau CA, Pshenichnov I, Puddu G, Pulvirenti A, Punin V, Putiš M, Putschke J, Quercigh E, Qvigstad H, Rachevski A, Rademakers A, Radomski S, Räihä TS, Rak J, Rakotozafindrabe A, Ramello L, Ramírez Reyes A, Raniwala S, Raniwala R, Räsänen SS, Rascanu BT, Rathee D, Read KF, Real JS, Redlich K, Reichelt P, Reicher M, Renfordt R, Reolon AR, Reshetin A, Rettig F, Revol JP, Reygers K, Ricaud H, Riccati L, Ricci RA, Richter M, Riedler P, Riegler W, Riggi F, Rodríguez Cahuantzi M, Rohr D, Röhrich D, Romita R, Ronchetti F, Rosnet P, Rossegger S, Rossi A, Roukoutakis F, Roy C, Roy P, Rubio Montero AJ, Rui R, Ryabinkin E, Rybicki A, Sadovsky S, Safařík K, Sahu PK, Saini J, Sakaguchi H, Sakai S, Sakata D, Salgado CA, Sambyal S, Samsonov V, Sanchez Castro X, Sándor L, Sandoval A, Sano M, Sano S, Santo R, Santoro R, Sarkamo J, Scapparone E, Scarlassara F, Scharenberg RP, Schiaua C, Schicker R, Schmidt HR, Schmidt C, Schreiner S, Schuchmann S, Schukraft J, Schutz Y, Schwarz K, Schweda K, Scioli G, Scomparin E, Scott R, Scott PA, Segato G, Selyuzhenkov I, Senyukov S, Seo J, Serci S, Serradilla E, Sevcenco A, Sgura I, Shabratova G, Shahoyan R, Sharma N, Sharma S, Shigaki K, Shimomura M, Shtejer K, Sibiriak Y, Siciliano M, Sicking E, Siddhanta S, Siemiarczuk T, Silvermyr D, Simonetti G, Singaraju R, Singh R, Singha S, Sinha T, Sinha BC, Sitar B, Sitta M, Skaali TB, Skjerdal K, Smakal R, Smirnov N, Snellings R, Søgaard C, Soltz R, Son H, Song J, Song M, Soos C, Soramel F, Spyropoulou-Stassinaki M, Srivastava BK, Stachel J, Stan I, Stan I, Stefanek G, Stefanini G, Steinbeck T, Steinpreis M, Stenlund E, Steyn G, Stocco D, Stolpovskiy M, Strmen P, Suaide AAP, Subieta Vásquez MA, Sugitate T, Suire C, Sukhorukov M, Sultanov R, Sumbera M, Susa T, Szanto de Toledo A, Szarka I, Szostak A, Tagridis C, Takahashi J, Tapia Takaki JD, Tauro A, Tejeda Muñoz G, Telesca A, Terrevoli C, Thäder J, Thomas JH, Thomas D, Tieulent R, Timmins AR, Tlusty D, Toia A, Torii H, Toscano L, Tosello F, Traczyk T, Truesdale D, Trzaska WH, Tsuji T, Tumkin A, Turrisi R, Tveter TS, Ulery J, Ullaland K, Ulrich J, Uras A, Urbán J, Urciuoli GM, Usai GL, Vajzer M, Vala M, Valencia Palomo L, Vallero S, van der Kolk N, Vande Vyvre P, van Leeuwen M, Vannucci L, Vargas A, Varma R, Vasileiou M, Vasiliev A, Vechernin V, Veldhoen M, Venaruzzo M, Vercellin E, Vergara S, Vernekohl DC, Vernet R, Verweij M, Vickovic L, Viesti G, Vikhlyantsev O, Vilakazi Z, Villalobos Baillie O, Vinogradov A, Vinogradov L, Vinogradov Y, Virgili T, Viyogi YP, Vodopyanov A, Voloshin K, Voloshin S, Volpe G, von Haller B, Vranic D, Vrláková J, Vulpescu B, Vyushin A, Wagner V, Wagner B, Wan R, Wang Y, Wang D, Wang Y, Wang M, Watanabe K, Wessels JP, Westerhoff U, Wiechula J, Wikne J, Wilde M, Wilk G, Wilk A, Williams MCS, Windelband B, Xaplanteris Karampatsos L, Yang H, Yano S, Yasnopolskiy S, Yi J, Yin Z, Yokoyama H, Yoo IK, Yoon J, Yu W, Yuan X, Yushmanov I, Zach C, Zampolli C, Zaporozhets S, Zarochentsev A, Závada P, Zaviyalov N, Zbroszczyk H, Zelnicek P, Zgura I, Zhalov M, Zhang X, Zhou F, Zhou D, Zhou Y, Zhu X, Zichichi A, Zimmermann A, Zinovjev G, Zoccarato Y, Zynovyev M. J/ψ polarization in pp collisions at √s=7 TeV. PHYSICAL REVIEW LETTERS 2012; 108:082001. [PMID: 22463524 DOI: 10.1103/physrevlett.108.082001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Indexed: 05/31/2023]
Abstract
The ALICE Collaboration has studied J/ψ production in pp collisions at √s=7 TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/ψ polarization parameters λ(θ) and λ(φ) were obtained. The study was performed in the kinematic region 2.5<y<4, 2<p(t)<8 GeV/c, in the helicity and Collins-Soper reference frames. In both frames, the polarization parameters are compatible with zero, within uncertainties.
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Aamodt K, Abelev B, Abrahantes Quintana A, Adamová D, Adare AM, Aggarwal MM, Aglieri Rinella G, Agocs AG, Agostinelli A, Aguilar Salazar S, Ahammed Z, Ahmad N, Ahmad Masoodi A, Ahn SU, Akindinov A, Aleksandrov D, Alessandro B, Alfaro Molina R, Alici A, Alkin A, Almaráz Aviña E, Alt T, Altini V, Altsybeev I, Andrei C, Andronic A, Anguelov V, Anson C, Antičić T, Antinori F, Antonioli P, Aphecetche L, Appelshäuser H, Arbor N, Arcelli S, Arend A, Armesto N, Arnaldi R, Aronsson T, Arsene IC, Arslandok M, Asryan A, Augustinus A, Averbeck R, Awes TC, Äystö J, Azmi MD, Bach M, Badalà A, Baek YW, Bailhache R, Bala R, Baldini Ferroli R, Baldisseri A, Baldit A, Bán J, Baral RC, Barbera R, Barile F, Barnaföldi GG, Barnby LS, Barret V, Bartke J, Basile M, Bastid N, Bathen B, Batigne G, Batyunya B, Baumann C, Bearden IG, Beck H, Belikov I, Bellini F, Bellwied R, Belmont-Moreno E, Beole S, Berceanu I, Bercuci A, Berdermann E, Berdnikov Y, Bergmann C, Betev L, Bhasin A, Bhati AK, Bianchi L, Bianchi N, Bianchin C, Bielčík J, Bielčíková J, Bilandzic A, Biolcati E, Blanco F, Blanco F, Blau D, Blume C, Boccioli M, Bock N, Bogdanov A, Bøggild H, Bogolyubsky M, Boldizsár L, Bombara M, Bombonati C, Book J, Borel H, Borissov A, Bortolin C, Bose S, Bossú F, Botje M, Böttger S, Boyer B, Braun-Munzinger P, Bravina L, Bregant M, Breitner T, Broz M, Brun R, Bruna E, Bruno GE, Budnikov D, Buesching H, Bufalino S, Bugaiev K, Busch O, Buthelezi Z, Caffarri D, Cai X, Caines H, Calvo Villar E, Camerini P, Canoa Roman V, Cara Romeo G, Carena F, Carena W, Carlin Filho N, Carminati F, Casanova Díaz A, Caselle M, Castillo Castellanos J, Castillo Hernandez JF, Catanescu V, Cavicchioli C, Cepila J, Cerello P, Chang B, Chapeland S, Charvet JL, Chattopadhyay S, Chattopadhyay S, Cherney M, Cheshkov C, Cheynis B, Chibante Barroso V, Chinellato DD, Chochula P, Chojnacki M, Christakoglou P, Christensen CH, Christiansen P, Chujo T, Cicalo C, Cifarelli L, Cindolo F, Cleymans J, Coccetti F, Coffin JP, Conesa Balbastre G, Conesa del Valle Z, Constantin P, Contin G, Contreras JG, Cormier TM, Corrales Morales Y, Cortese P, Cortés Maldonado I, Cosentino MR, Costa F, Cotallo ME, Crescio E, Crochet P, Cuautle E, Cunqueiro L, Dainese A, Dalsgaard HH, Danu A, Das I, Das D, Dash S, Dash A, De S, De Azevedo Moregula A, de Barros GOV, De Caro A, de Cataldo G, de Cuveland J, De Falco A, De Gruttola D, Delagrange H, Del Castillo Sanchez E, Delgado Mercado Y, Dellacasa G, Deloff A, Demanov V, De Marco N, Dénes E, De Pasquale S, Deppman A, Erasmo GD, de Rooij R, Di Bari D, Dietel T, Di Giglio C, Di Liberto S, Di Mauro A, Di Nezza P, Divià R, Djuvsland Ø, Dobrin A, Dobrowolski T, Domínguez I, Dönigus B, Dordic O, Driga O, Dubey AK, Ducroux L, Dupieux P, Dutta Majumdar MR, Dutta Majumdar AK, Elia D, Emschermann D, Engel H, Erdal HA, Espagnon B, Estienne M, Esumi S, Evans D, Evrard S, Eyyubova G, Fabjan CW, Fabris D, Faivre J, Falchieri D, Fantoni A, Fasel M, Fearick R, Fedunov A, Fehlker D, Fekete V, Felea D, Feofilov G, Fernández Téllez A, Ferretti R, Ferretti A, Figueredo MAS, Filchagin S, Fini R, Finogeev D, Fionda FM, Fiore EM, Floris M, Foertsch S, Foka P, Fokin S, Fragiacomo E, Fragkiadakis M, Frankenfeld U, Fuchs U, Furano F, Furget C, Fusco Girard M, Gaardhøje JJ, Gadrat S, Gagliardi M, Gago A, Gallio M, Gangadharan DR, Ganoti P, Garabatos C, Garcia-Solis E, Gemme R, Gerhard J, Germain M, Geuna C, Gheata M, Gheata A, Ghidini B, Ghosh P, Gianotti P, Girard MR, Giubellino P, Gladysz-Dziadus E, Glässel P, Gomez R, Ferreiro EG, González-Trueba LH, González-Zamora P, Gorbunov S, Gotovac S, Grabski V, Graczykowski LK, Grajcarek R, Grelli A, Grigoras C, Grigoras A, Grigoriev V, Grigoryan S, Grigoryan A, Grinyov B, Grion N, Gros P, Grosse-Oetringhaus JF, Grossiord JY, Guber F, Guernane R, Guerra Gutierrez C, Guerzoni B, Guilbaud M, Gulbrandsen K, Gulkanyan H, Gunji T, Gupta R, Gupta A, Gutbrod H, Haaland Ø, Hadjidakis C, Haiduc M, Hamagaki H, Hamar G, Han BH, Hanratty LD, Harmanova Z, Harris JW, Hartig M, Hasegan D, Hatzifotiadou D, Hayrapetyan A, Heide M, Heinz M, Helstrup H, Herghelegiu A, Herrera Corral G, Herrmann N, Hetland KF, Hicks B, Hille PT, Hippolyte B, Horaguchi T, Hori Y, Hristov P, Hřivnáčová I, Huang M, Huber S, Humanic TJ, Hwang DS, Ilkaev R, Ilkiv I, Inaba M, Incani E, Innocenti GM, Ippolitov M, Irfan M, Ivan C, Ivanov V, Ivanov A, Ivanov M, Jachołkowski A, Jacobs PM, Jancurová L, Jangal S, Janik MA, Janik R, Jayarathna PHSY, Jena S, Jirden L, Jones GT, Jones PG, Jovanović P, Jung W, Jung H, Jusko A, Kaidalov AB, Kalcher S, Kaliňák P, Kalisky M, Kalliokoski T, Kalweit A, Kamermans R, Kanaki K, Kang JH, Kang E, Kaplin V, Karasu Uysal A, Karavichev O, Karavicheva T, Karpechev E, Kazantsev A, Kebschull U, Keidel R, Khan MM, Khan P, Khanzadeev A, Kharlov Y, Kileng B, Kim S, Kim B, Kim DJ, Kim SH, Kim DS, Kim DW, Kim JH, Kim JS, Kim M, Kirsch S, Kisel I, Kiselev S, Kisiel A, Klay JL, Klein J, Klein-Bösing C, Kliemant M, Kluge A, Knichel ML, Koch K, Köhler MK, Kolojvari A, Kondratiev V, Kondratyeva N, Konevskih A, Kornaś E, Kottachchi Kankanamge Don C, Kour R, Kowalski M, Kox S, Koyithatta Meethaleveedu G, Kozlov K, Kral J, Králik I, Kramer F, Kraus I, Krawutschke T, Kretz M, Krivda M, Krizek F, Krus M, Kryshen E, Krzewicki M, Kucheriaev Y, Kuhn C, Kuijer PG, Kurashvili P, Kurepin A, Kurepin AB, Kuryakin A, Kushpil S, Kushpil V, Kvaerno H, Kweon MJ, Kwon Y, Ladrón de Guevara P, Lafage V, Lakomov I, Lara C, Lardeux A, La Rocca P, Larsen DT, Lazzeroni C, Lea R, Le Bornec Y, Lee KS, Lee SC, Lefèvre F, Lehnert J, Leistam L, Lenhardt M, Lenti V, León H, León Monzón I, León Vargas H, Lévai P, Li X, Lien J, Lietava R, Lindal S, Lindenstruth V, Lippmann C, Lisa MA, Liu L, Loenne PI, Loggins VR, Loginov V, Lohn S, Lohner D, Loizides C, Loo KK, Lopez X, López Noriega M, López Torres E, Løvhøiden G, Lu XG, Luettig P, Lunardon M, Luparello G, Luquin L, Luzzi C, Ma K, Ma R, Madagodahettige-Don DM, Maevskaya A, Mager M, Mahapatra DP, Maire A, Malaev M, Maldonado Cervantes I, Mal'Kevich D, Malzacher P, Mamonov A, Mangotra L, Manko V, Manso F, Manzari V, Mao Y, Marchisone M, Mareš J, Margagliotti GV, Margotti A, Marín A, Markert C, Martashvili I, Martinengo P, Martínez MI, Martínez Davalos A, Martínez García G, Martynov Y, Mas A, Masciocchi S, Masera M, Masoni A, Massacrier L, Mastromarco M, Mastroserio A, Matthews ZL, Matyja A, Mayani D, Mazzoni MA, Meddi F, Menchaca-Rocha A, Mendez Lorenzo P, Mercado Pérez J, Meres M, Miake Y, Midori J, Milano L, Milosevic J, Mischke A, Miśkowiec D, Mitu C, Mlynarz J, Mohanty B, Mohanty AK, Molnar L, Montaño Zetina L, Monteno M, Montes E, Morando M, Moreira De Godoy DA, Moretto S, Morsch A, Muccifora V, Mudnic E, Muhuri S, Müller H, Munhoz MG, Musa L, Musso A, Nagle JL, Nandi BK, Nania R, Nappi E, Nattrass C, Navach F, Navin S, Nayak TK, Nazarenko S, Nazarov G, Nedosekin A, Nicassio M, Nielsen BS, Niida T, Nikolaev S, Nikolic V, Nikulin S, Nikulin V, Nilsen BS, Nilsson MS, Noferini F, Nooren G, Novitzky N, Nyanin A, Nyatha A, Nygaard C, Nystrand J, Obayashi H, Ochirov A, Oeschler H, Oh SK, Oleniacz J, Oppedisano C, Ortiz Velasquez A, Ortona G, Oskarsson A, Ostrowski P, Otwinowski J, Oyama K, Ozawa K, Pachmayer Y, Pachr M, Padilla F, Pagano P, Paić G, Painke F, Pajares C, Pal SK, Pal S, Palaha A, Palmeri A, Pappalardo GS, Park WJ, Pastirčák B, Patalakha DI, Paticchio V, Pavlinov A, Pawlak T, Peitzmann T, Peresunko D, Pérez Lara CE, Perini D, Peryt W, Pesci A, Peskov V, Pestov Y, Peters AJ, Petráček V, Petran M, Petris M, Petrov P, Petrovici M, Petta C, Piano S, Piccotti A, Pikna M, Pillot P, Pinazza O, Pinsky L, Pitz N, Piyarathna DB, Platt R, Płoskoń M, Pluta J, Pocheptsov T, Pochybova S, Podesta-Lerma PLM, Poghosyan MG, Polák K, Polichtchouk B, Pop A, Pospíšil V, Potukuchi B, Prasad SK, Preghenella R, Prino F, Pruneau CA, Pshenichnov I, Puddu G, Pulvirenti A, Punin V, Putiš M, Putschke J, Qvigstad H, Rachevski A, Rademakers A, Radomski S, Räihä TS, Rak J, Rakotozafindrabe A, Ramello L, Ramírez Reyes A, Rammler M, Raniwala R, Raniwala S, Räsänen SS, Rathee D, Read KF, Real JS, Redlich K, Reichelt P, Reicher M, Renfordt R, Reolon AR, Reshetin A, Rettig F, Revol JP, Reygers K, Ricaud H, Riccati L, Ricci RA, Richter M, Riedler P, Riegler W, Riggi F, Rodríguez Cahuantzi M, Rohr D, Röhrich D, Romita R, Ronchetti F, Rosinský P, Rosnet P, Rossegger S, Rossi A, Roukoutakis F, Rousseau S, Roy P, Roy C, Rubio Montero AJ, Rui R, Ryabinkin E, Rybicki A, Sadovsky S, Šafařík K, Sahoo R, Sahu PK, Saiz P, Sakaguchi H, Sakai S, Sakata D, Salgado CA, Sambyal S, Samsonov V, Sanchez Castro X, Šándor L, Sandoval A, Sano S, Sano M, Santo R, Santoro R, Sarkamo J, Saturnini P, Scapparone E, Scarlassara F, Scharenberg RP, Schiaua C, Schicker R, Schmidt C, Schmidt HR, Schreiner S, Schuchmann S, Schukraft J, Schutz Y, Schwarz K, Schweda K, Scioli G, Scomparin E, Scott R, Scott PA, Segato G, Selyuzhenkov I, Senyukov S, Serci S, Serradilla E, Sevcenco A, Sgura I, Shabratova G, Shahoyan R, Sharma S, Sharma N, Shigaki K, Shimomura M, Shtejer K, Sibiriak Y, Siciliano M, Sicking E, Siemiarczuk T, Silvermyr D, Simonetti G, Singaraju R, Singh R, Singha S, Sinha T, Sinha BC, Sitar B, Sitta M, Skaali TB, Skjerdal K, Smakal R, Smirnov N, Snellings R, Søgaard C, Soltz R, Son H, Song M, Song J, Soos C, Soramel F, Spyropoulou-Stassinaki M, Srivastava BK, Stachel J, Stan I, Stefanek G, Steinbeck T, Steinpreis M, Stenlund E, Steyn G, Stocco D, Stokkevag CH, Stolpovskiy M, Strmen P, Suaide AAP, Subieta Vásquez MA, Sugitate T, Suire C, Sukhorukov M, Sumbera M, Susa T, Symons TJM, Szanto de Toledo A, Szarka I, Szostak A, Tagridis C, Takahashi J, Tapia Takaki JD, Tauro A, Tejeda Muñoz G, Telesca A, Terrevoli C, Thäder J, Thomas D, Thomas JH, Tieulent R, Timmins AR, Tlusty D, Toia A, Torii H, Toscano L, Traczyk T, Truesdale D, Trzaska WH, Tsuji T, Tumkin A, Turrisi R, Turvey AJ, Tveter TS, Ulery J, Ullaland K, Uras A, Urbán J, Urciuoli GM, Usai GL, Vajzer M, Vala M, Valencia Palomo L, Vallero S, van der Kolk N, Vande Vyvre P, van Leeuwen M, Vannucci L, Vargas A, Varma R, Vasileiou M, Vasiliev A, Vechernin V, Veldhoen M, Venaruzzo M, Vercellin E, Vergara S, Vernekohl DC, Vernet R, Verweij M, Vickovic L, Viesti G, Vikhlyantsev O, Vilakazi Z, Villalobos Baillie O, Vinogradov Y, Vinogradov A, Vinogradov L, Virgili T, Viyogi YP, Vodopyanov A, Voloshin K, Voloshin S, Volpe G, von Haller B, Vranic D, Øvrebekk G, Vrláková J, Vulpescu B, Vyushin A, Wagner B, Wagner V, Wan R, Wang Y, Wang Y, Wang M, Wang D, Watanabe K, Wessels JP, Westerhoff U, Wiechula J, Wikne J, Wilde M, Wilk A, Wilk G, Williams MCS, Windelband B, Xaplanteris Karampatsos L, Yang H, Yasnopolskiy S, Yi J, Yin Z, Yokoyama H, Yoo IK, Yoon J, Yuan X, Yushmanov I, Zabrodin E, Zach C, Zampolli C, Zaporozhets S, Zarochentsev A, Závada P, Zaviyalov N, Zbroszczyk H, Zelnicek P, Zenin A, Zgura I, Zhalov M, Zhang X, Zhou D, Zhou F, Zhou Y, Zhu X, Zichichi A, Zinovjev G, Zoccarato Y, Zynovyev M. Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at sqrt(s(NN)) = 2.76 TeV. PHYSICAL REVIEW LETTERS 2011; 107:032301. [PMID: 21838350 DOI: 10.1103/physrevlett.107.032301] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Indexed: 05/31/2023]
Abstract
We report on the first measurement of the triangular v3, quadrangular v4, and pentagonal v5 charged particle flow in Pb-Pb collisions at sqrt(s(NN)) = 2.76 TeV measured with the ALICE detector at the CERN Large Hadron Collider. We show that the triangular flow can be described in terms of the initial spatial anisotropy and its fluctuations, which provides strong constraints on its origin. In the most central events, where the elliptic flow v2 and v3 have similar magnitude, a double peaked structure in the two-particle azimuthal correlations is observed, which is often interpreted as a Mach cone response to fast partons. We show that this structure can be naturally explained from the measured anisotropic flow Fourier coefficients.
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Wang X, Xie Z, Padilla F, LeCarpentier G, Carson P. TU-C-220-06: Photoacoustic Imaging of Deep Targets in the Breast Using a Multi-Channel 2D Array Transducer. Med Phys 2011. [DOI: 10.1118/1.3613166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Padilla F, Carson P, Hooi F, Goodsitt M, van der Spek S, Larson S, Hanes C. MO-D-220-10: Automatic Quality Control Processing for Detection of Elements Dropout in Ultrasound Transducers. Med Phys 2011. [DOI: 10.1118/1.3612992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Aamodt K, Abrahantes Quintana A, Adamová D, Adare AM, Aggarwal MM, Aglieri Rinella G, Agocs AG, Aguilar Salazar S, Ahammed Z, Ahmad N, Ahmad Masoodi A, Ahn SU, Akindinov A, Aleksandrov D, Alessandro B, Alfaro Molina R, Alici A, Alkin A, Almaráz Aviña E, Alt T, Altini V, Altinpinar S, Altsybeev I, Andrei C, Andronic A, Anguelov V, Anson C, Antičić T, Antinori F, Antonioli P, Aphecetche L, Appelshäuser H, Arbor N, Arcelli S, Arend A, Armesto N, Arnaldi R, Aronsson T, Arsene IC, Asryan A, Augustinus A, Averbeck R, Awes TC, Aystö J, Azmi MD, Bach M, Badalà A, Baek YW, Bagnasco S, Bailhache R, Bala R, Baldini Ferroli R, Baldisseri A, Baldit A, Bán J, Barbera R, Barile F, Barnaföldi GG, Barnby LS, Barret V, Bartke J, Basile M, Bastid N, Bathen B, Batigne G, Batyunya B, Baumann C, Bearden IG, Beck H, Belikov I, Bellini F, Bellwied R, Belmont-Moreno E, Beole S, Berceanu I, Bercuci A, Berdermann E, Berdnikov Y, Betev L, Bhasin A, Bhati AK, Bianchi L, Bianchi N, Bianchin C, Bielčík J, Bielčíková J, Bilandzic A, Biolcati E, Blanc A, Blanco F, Blanco F, Blau D, Blume C, Boccioli M, Bock N, Bogdanov A, Bøggild H, Bogolyubsky M, Boldizsár L, Bombara M, Bombonati C, Book J, Borel H, Bortolin C, Bose S, Bossú F, Botje M, Böttger S, Boyer B, Braun-Munzinger P, Bravina L, Bregant M, Breitner T, Broz M, Brun R, Bruna E, Bruno GE, Budnikov D, Buesching H, Busch O, Buthelezi Z, Caffarri D, Cai X, Caines H, Calvo Villar E, Camerini P, Canoa Roman V, Cara Romeo G, Carena F, Carena W, Carminati F, Casanova Díaz A, Caselle M, Castillo Castellanos J, Catanescu V, Cavicchioli C, Cerello P, Chang B, Chapeland S, Charvet JL, Chattopadhyay S, Chattopadhyay S, Cherney M, Cheshkov C, Cheynis B, Chiavassa E, Chibante Barroso V, Chinellato DD, Chochula P, Chojnacki M, Christakoglou P, Christensen CH, Christiansen P, Chujo T, Cicalo C, Cifarelli L, Cindolo F, Cleymans J, Coccetti F, Coffin JP, Coli S, Conesa Balbastre G, Conesa Del Valle Z, Constantin P, Contin G, Contreras JG, Cormier TM, Corrales Morales Y, Cortés Maldonado I, Cortese P, Cosentino MR, Costa F, Cotallo ME, Crescio E, Crochet P, Cuautle E, Cunqueiro L, Erasmo GD, Dainese A, Dalsgaard HH, Danu A, Das D, Das I, Dash A, Dash S, De S, De Azevedo Moregula A, de Barros GOV, De Caro A, de Cataldo G, de Cuveland J, De Falco A, De Gruttola D, De Marco N, De Pasquale S, De Remigis R, de Rooij R, Delagrange H, Delgado Mercado Y, Dellacasa G, Deloff A, Demanov V, Dénes E, Deppman A, Di Bari D, Di Giglio C, Di Liberto S, Di Mauro A, Di Nezza P, Dietel T, Divià R, Djuvsland Ø, Dobrin A, Dobrowolski T, Domínguez I, Dönigus B, Dordic O, Driga O, Dubey AK, Ducroux L, Dupieux P, Dutta Majumdar AK, Dutta Majumdar MR, Elia D, Emschermann D, Engel H, Erdal HA, Espagnon B, Estienne M, Esumi S, Evans D, Evrard S, Eyyubova G, Fabjan CW, Fabris D, Faivre J, Falchieri D, Fantoni A, Fasel M, Fearick R, Fedunov A, Fehlker D, Fekete V, Felea D, Feofilov G, Fernández Téllez A, Ferretti A, Ferretti R, Figueredo MAS, Filchagin S, Fini R, Finogeev D, Fionda FM, Fiore EM, Floris M, Foertsch S, Foka P, Fokin S, Fragiacomo E, Fragkiadakis M, Frankenfeld U, Fuchs U, Furano F, Furget C, Fusco Girard M, Gaardhøje JJ, Gadrat S, Gagliardi M, Gago A, Gallio M, Ganoti P, Garabatos C, Gemme R, Gerhard J, Germain M, Geuna C, Gheata A, Gheata M, Ghidini B, Ghosh P, Girard MR, Giraudo G, Giubellino P, Gladysz-Dziadus E, Glässel P, Gomez R, González-Trueba LH, González-Zamora P, González Santos H, Gorbunov S, Gotovac S, Grabski V, Grajcarek R, Grelli A, Grigoras A, Grigoras C, Grigoriev V, Grigoryan A, Grigoryan S, Grinyov B, Grion N, Gros P, Grosse-Oetringhaus JF, Grossiord JY, Grosso R, Guber F, Guernane R, Guerra Gutierrez C, Guerzoni B, Gulbrandsen K, Gulkanyan H, Gunji T, Gupta A, Gupta R, Gutbrod H, Haaland Ø, Hadjidakis C, Haiduc M, Hamagaki H, Hamar G, Harris JW, Hartig M, Hasch D, Hasegan D, Hatzifotiadou D, Hayrapetyan A, Heide M, Heinz M, Helstrup H, Herghelegiu A, Hernández C, Herrera Corral G, Herrmann N, Hetland KF, Hicks B, Hille PT, Hippolyte B, Horaguchi T, Hori Y, Hristov P, Hřivnáčová I, Huang M, Huber S, Humanic TJ, Hwang DS, Ichou R, Ilkaev R, Ilkiv I, Inaba M, Incani E, Innocenti GM, Innocenti PG, Ippolitov M, Irfan M, Ivan C, Ivanov A, Ivanov M, Ivanov V, Jachołkowski A, Jacobs PM, Jancurová L, Jangal S, Janik R, Jayarathna SP, Jena S, Jirden L, Jones GT, Jones PG, Jovanović P, Jung H, Jung W, Jusko A, Kalcher S, Kaliňák P, Kalisky M, Kalliokoski T, Kalweit A, Kamermans R, Kanaki K, Kang E, Kang JH, Kaplin V, Karavichev O, Karavicheva T, Karpechev E, Kazantsev A, Kebschull U, Keidel R, Khan MM, Khanzadeev A, Kharlov Y, Kileng B, Kim DJ, Kim DS, Kim DW, Kim HN, Kim JH, Kim JS, Kim M, Kim M, Kim S, Kim SH, Kirsch S, Kisel I, Kiselev S, Kisiel A, Klay JL, Klein J, Klein-Bösing C, Kliemant M, Klovning A, Kluge A, Knichel ML, Koch K, Köhler MK, Kolevatov R, Kolojvari A, Kondratiev V, Kondratyeva N, Konevskih A, Kornaś E, Kottachchi Kankanamge Don C, Kour R, Kowalski M, Kox S, Koyithatta Meethaleveedu G, Kozlov K, Kral J, Králik I, Kramer F, Kraus I, Krawutschke T, Kretz M, Krivda M, Krumbhorn D, Krus M, Kryshen E, Krzewicki M, Kucheriaev Y, Kuhn C, Kuijer PG, Kurashvili P, Kurepin A, Kurepin AB, Kuryakin A, Kushpil S, Kushpil V, Kweon MJ, Kwon Y, La Rocca P, Ladrón de Guevara P, Lafage V, Lara C, Larsen DT, Lazzeroni C, Le Bornec Y, Lea R, Lee KS, Lee SC, Lefèvre F, Lehnert J, Leistam L, Lenhardt M, Lenti V, León Monzón I, León Vargas H, Lévai P, Li X, Lietava R, Lindal S, Lindenstruth V, Lippmann C, Lisa MA, Liu L, Loggins VR, Loginov V, Lohn S, Lohner D, Loizides C, Lopez X, López Noriega M, López Torres E, Løvhøiden G, Lu XG, Luettig P, Lunardon M, Luparello G, Luquin L, Luzzi C, Ma K, Ma R, Madagodahettige-Don DM, Maevskaya A, Mager M, Mahapatra DP, Maire A, Malaev M, Maldonado Cervantes I, Mal'Kevich D, Malzacher P, Mamonov A, Manceau L, Mangotra L, Manko V, Manso F, Manzari V, Mao Y, Mareš J, Margagliotti GV, Margotti A, Marín A, Martashvili I, Martinengo P, Martínez MI, Martínez Davalos A, Martínez García G, Martynov Y, Mas A, Masciocchi S, Masera M, Masoni A, Massacrier L, Mastromarco M, Mastroserio A, Matthews ZL, Matyja A, Mayani D, Mazza G, Mazzoni MA, Meddi F, Menchaca-Rocha A, Mendez Lorenzo P, Mercado Pérez J, Mereu P, Miake Y, Midori J, Milano L, Milosevic J, Mischke A, Miśkowiec D, Mitu C, Mlynarz J, Mohanty B, Molnar L, Montaño Zetina L, Monteno M, Montes E, Morando M, Moreira De Godoy DA, Moretto S, Morsch A, Muccifora V, Mudnic E, Müller H, Muhuri S, Munhoz MG, Munoz J, Musa L, Musso A, Nandi BK, Nania R, Nappi E, Nattrass C, Navach F, Navin S, Nayak TK, Nazarenko S, Nazarov G, Nedosekin A, Nendaz F, Newby J, Nicassio M, Nielsen BS, Nikolaev S, Nikolic V, Nikulin S, Nikulin V, Nilsen BS, Nilsson MS, Noferini F, Nooren G, Novitzky N, Nyanin A, Nyatha A, Nygaard C, Nystrand J, Obayashi H, Ochirov A, Oeschler H, Oh SK, Oleniacz J, Oppedisano C, Ortiz Velasquez A, Ortona G, Oskarsson A, Ostrowski P, Otterlund I, Otwinowski J, Øvrebekk G, Oyama K, Ozawa K, Pachmayer Y, Pachr M, Padilla F, Pagano P, Paić G, Painke F, Pajares C, Pal S, Pal SK, Palaha A, Palmeri A, Pappalardo GS, Park WJ, Paticchio V, Pavlinov A, Pawlak T, Peitzmann T, Peresunko D, Pérez Lara CE, Perini D, Perrino D, Peryt W, Pesci A, Peskov V, Pestov Y, Peters AJ, Petráček V, Petris M, Petrov P, Petrovici M, Petta C, Piano S, Piccotti A, Pikna M, Pillot P, Pinazza O, Pinsky L, Pitz N, Piuz F, Piyarathna DB, Platt R, Płoskoń M, Pluta J, Pocheptsov T, Pochybova S, Podesta-Lerma PLM, Poghosyan MG, Polák K, Polichtchouk B, Pop A, Pospíšil V, Potukuchi B, Prasad SK, Preghenella R, Prino F, Pruneau CA, Pshenichnov I, Puddu G, Pulvirenti A, Punin V, Putiš M, Putschke J, Quercigh E, Qvigstad H, Rachevski A, Rademakers A, Rademakers O, Radomski S, Räihä TS, Rak J, Rakotozafindrabe A, Ramello L, Ramírez Reyes A, Rammler M, Raniwala R, Raniwala S, Räsänen SS, Read KF, Real JS, Redlich K, Renfordt R, Reolon AR, Reshetin A, Rettig F, Revol JP, Reygers K, Ricaud H, Riccati L, Ricci RA, Richter M, Riedler P, Riegler W, Riggi F, Rivetti A, Rodríguez Cahuantzi M, Rohr D, Röhrich D, Romita R, Ronchetti F, Rosinský P, Rosnet P, Rossegger S, Rossi A, Roukoutakis F, Rousseau S, Roy C, Roy P, Rubio Montero AJ, Rui R, Rusanov I, Ryabinkin E, Rybicki A, Sadovsky S, Safařík K, Sahoo R, Sahu PK, Saiz P, Sakai S, Sakata D, Salgado CA, Samanta T, Sambyal S, Samsonov V, Sándor L, Sandoval A, Sano M, Sano S, Santo R, Santoro R, Sarkamo J, Saturnini P, Scapparone E, Scarlassara F, Scharenberg RP, Schiaua C, Schicker R, Schmidt C, Schmidt HR, Schreiner S, Schuchmann S, Schukraft J, Schutz Y, Schwarz K, Schweda K, Scioli G, Scomparin E, Scott PA, Scott R, Segato G, Senyukov S, Seo J, Serci S, Serradilla E, Sevcenco A, Shabratova G, Shahoyan R, Sharma N, Sharma S, Shigaki K, Shimomura M, Shtejer K, Sibiriak Y, Siciliano M, Sicking E, Siemiarczuk T, Silenzi A, Silvermyr D, Simonetti G, Singaraju R, Singh R, Sinha BC, Sinha T, Sitar B, Sitta M, Skaali TB, Skjerdal K, Smakal R, Smirnov N, Snellings R, Søgaard C, Soloviev A, Soltz R, Son H, Song M, Soos C, Soramel F, Spyropoulou-Stassinaki M, Srivastava BK, Stachel J, Stan I, Stefanek G, Stefanini G, Steinbeck T, Stenlund E, Steyn G, Stocco D, Stock R, Stolpovskiy M, Strmen P, Suaide AAP, Subieta Vásquez MA, Sugitate T, Suire C, Sumbera M, Susa T, Swoboda D, Symons TJM, Szanto de Toledo A, Szarka I, Szostak A, Tagridis C, Takahashi J, Tapia Takaki JD, Tauro A, Tavlet M, Tejeda Muñoz G, Telesca A, Terrevoli C, Thäder J, Thomas D, Thomas JH, Tieulent R, Timmins AR, Tlusty D, Toia A, Torii H, Toscano L, Tosello F, Traczyk T, Truesdale D, Trzaska WH, Tumkin A, Turrisi R, Turvey AJ, Tveter TS, Ulery J, Ullaland K, Uras A, Urbán J, Urciuoli GM, Usai GL, Vacchi A, Vala M, Valencia Palomo L, Vallero S, van der Kolk N, van Leeuwen M, Vande Vyvre P, Vannucci L, Vargas A, Varma R, Vasileiou M, Vasiliev A, Vechernin V, Venaruzzo M, Vercellin E, Vergara S, Vernet R, Verweij M, Vickovic L, Viesti G, Vikhlyantsev O, Vilakazi Z, Villalobos Baillie O, Vinogradov A, Vinogradov L, Vinogradov Y, Virgili T, Viyogi YP, Vodopyanov A, Voloshin K, Voloshin S, Volpe G, von Haller B, Vranic D, Vrláková J, Vulpescu B, Wagner B, Wagner V, Wan R, Wang D, Wang Y, Wang Y, Watanabe K, Wessels JP, Westerhoff U, Wiechula J, Wikne J, Wilde M, Wilk A, Wilk G, Williams MCS, Windelband B, Yang H, Yasnopolskiy S, Yi J, Yin Z, Yokoyama H, Yoo IK, Yuan X, Yushmanov I, Zabrodin E, Zampolli C, Zaporozhets S, Zarochentsev A, Závada P, Zbroszczyk H, Zelnicek P, Zenin A, Zgura I, Zhalov M, Zhang X, Zhou D, Zhu X, Zichichi A, Zinovjev G, Zoccarato Y, Zynovyev M. Centrality dependence of the charged-particle multiplicity density at midrapidity in Pb-Pb collisions at sqrt[s(NN)] = 2.76 TeV. PHYSICAL REVIEW LETTERS 2011; 106:032301. [PMID: 21405267 DOI: 10.1103/physrevlett.106.032301] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Indexed: 05/30/2023]
Abstract
The centrality dependence of the charged-particle multiplicity density at midrapidity in Pb-Pb collisions at sqrt[s_{NN}]=2.76 TeV is presented. The charged-particle density normalized per participating nucleon pair increases by about a factor of 2 from peripheral (70%-80%) to central (0%-5%) collisions. The centrality dependence is found to be similar to that observed at lower collision energies. The data are compared with models based on different mechanisms for particle production in nuclear collisions.
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Aamodt K, Abelev B, Quintana AA, Adamová D, Adare AM, Aggarwal MM, Rinella GA, Agocs AG, Salazar SA, Ahammed Z, Masoodi AA, Ahmad N, Ahn SU, Akindinov A, Aleksandrov D, Alessandro B, Molina RA, Alici A, Alkin A, Aviña EA, Alt T, Altini V, Altinpinar S, Altsybeev I, Andrei C, Andronic A, Anguelov V, Anson C, Antičić T, Antinori F, Antonioli P, Aphecetche L, Appelshäuser H, Arbor N, Arcelli S, Arend A, Armesto N, Arnaldi R, Aronsson T, Arsene IC, Asryan A, Augustinus A, Averbeck R, Awes TC, Aystö J, Azmi MD, Bach M, Badalà A, Baek YW, Bagnasco S, Bailhache R, Bala R, Ferroli RB, Baldisseri A, Baldit A, Pedrosa FBDS, Bán J, Barbera R, Barile F, Barnaföldi GG, Barnby LS, Barret V, Bartke J, Basile M, Bastid N, Bathen B, Batigne G, Batyunya B, Baumann C, Bearden IG, Beck H, Belikov I, Bellini F, Bellwied R, Belmont-Moreno E, Beole S, Berceanu I, Bercuci A, Berdermann E, Berdnikov Y, Bergmann C, Betev L, Bhasin A, Bhati AK, Bianchi L, Bianchi N, Bianchin C, Bielčík J, Bielčíková J, Bilandzic A, Biolcati E, Blanc A, Blanco F, Blanco F, Blau D, Blume C, Boccioli M, Bock N, Bogdanov A, Bøggild H, Bogolyubsky M, Boldizsár L, Bombara M, Bombonati C, Book J, Borel H, Borissov A, Bortolin C, Bose S, Bossú F, Botje M, Böttger S, Boyer B, Braun-Munzinger P, Bravina L, Bregant M, Breitner T, Broz M, Brun R, Bruna E, Bruno GE, Budnikov D, Buesching H, Bugaiev K, Busch O, Buthelezi Z, Caffarri D, Cai X, Caines H, Villar EC, Camerini P, Canoa Roman V, Romeo GC, Carena F, Carena W, Carminati F, Díaz AC, Caselle M, Castellanos JC, Catanescu V, Cavicchioli C, Cepila J, Cerello P, Chang B, Chapeland S, Charvet JL, Chattopadhyay S, Chattopadhyay S, Cherney M, Cheshkov C, Cheynis B, Chiavassa E, Barroso VC, Chinellato DD, Chochula P, Chojnacki M, Christakoglou P, Christensen CH, Christiansen P, Chujo T, Cicalo C, Cifarelli L, Cindolo F, Cleymans J, Coccetti F, Coffin JP, Coli S, Balbastre GC, del Valle ZC, Constantin P, Contin G, Contreras JG, Cormier TM, Morales YC, Maldonado IC, Cortese P, Cosentino MR, Costa F, Cotallo ME, Crescio E, Crochet P, Cuautle E, Cunqueiro L, Erasmo GD, Dainese A, Dalsgaard HH, Danu A, Das D, Das I, Das K, Dash A, Dash S, De S, Moregula ADA, de Barros GOV, De Caro A, de Cataldo G, de Cuveland J, De Falco A, De Gruttola D, De Marco N, De Pasquale S, De Remigis R, de Rooij R, Debski PR, Sanchez EDC, Delagrange H, Mercado YD, Dellacasa G, Deloff A, Demanov V, Dénes E, Deppman A, Di Bari D, Di Giglio C, Di Liberto S, Di Mauro A, Di Nezza P, Dietel T, Divià R, Djuvsland Ø, Dobrin A, Dobrowolski T, Domínguez I, Dönigus B, Dordic O, Driga O, Dubey AK, Dubuisson J, Ducroux L, Dupieux P, Majumdar AKD, Majumdar MRD, Elia D, Emschermann D, Engel H, Erdal HA, Espagnon B, Estienne M, Esumi S, Evans D, Evrard S, Eyyubova G, Fabjan CW, Fabris D, Faivre J, Falchieri D, Fantoni A, Fasel M, Fearick R, Fedunov A, Fehlker D, Fekete V, Felea D, Feofilov G, Téllez AF, Ferretti A, Ferretti R, Figiel J, Figueredo MAS, Filchagin S, Fini R, Finogeev D, Fionda FM, Fiore EM, Floris M, Foertsch S, Foka P, Fokin S, Fragiacomo E, Fragkiadakis M, Frankenfeld U, Fuchs U, Furano F, Furget C, Girard MF, Gaardhøje JJ, Gadrat S, Gagliardi M, Gago A, Gallio M, Gangadharan DR, Ganoti P, Ganti MS, Garabatos C, Garcia-Solis E, Garishvili I, Gemme R, Gerhard J, Germain M, Geuna C, Gheata A, Gheata M, Ghidini B, Ghosh P, Gianotti P, Girard MR, Giraudo G, Giubellino P, Gladysz-Dziadus E, Glässel P, Gomez R, Ferreiro EG, Santos HG, González-Trueba LH, González-Zamora P, Gorbunov S, Gotovac S, Grabski V, Grajcarek R, Grelli A, Grigoras A, Grigoras C, Grigoriev V, Grigoryan A, Grigoryan S, Grinyov B, Grion N, Gros P, Grosse-Oetringhaus JF, Grossiord JY, Grosso R, Guber F, Guernane R, Gutierrez CG, Guerzoni B, Gulbrandsen K, Gunji T, Gupta A, Gupta R, Gutbrod H, Haaland Ø, Hadjidakis C, Haiduc M, Hamagaki H, Hamar G, Harris JW, Hartig M, Hasch D, Hasegan D, Hatzifotiadou D, Hayrapetyan A, Heide M, Heinz M, Helstrup H, Herghelegiu A, Hernández C, Corral GH, Herrmann N, Hetland KF, Hicks B, Hille PT, Hippolyte B, Horaguchi T, Hori Y, Hristov P, Hřivnáčová I, Huang M, Huber S, Humanic TJ, Hwang DS, Ichou R, Ilkaev R, Ilkiv I, Inaba M, Incani E, Innocenti GM, Innocenti PG, Ippolitov M, Irfan M, Ivan C, Ivanov A, Ivanov M, Ivanov V, Jachołkowski A, Jacobs PM, Jancurová L, Jangal S, Janik R, Jena S, Jirden L, Jones GT, Jones PG, Jovanović P, Jung H, Jung W, Jusko A, Kalcher S, Kaliňák P, Kalisky M, Kalliokoski T, Kalweit A, Kamermans R, Kanaki K, Kang E, Kang JH, Kaplin V, Karavichev O, Karavicheva T, Karpechev E, Kazantsev A, Kebschull U, Keidel R, Khan MM, Khan SA, Khanzadeev A, Kharlov Y, Kileng B, Kim DJ, Kim DS, Kim DW, Kim HN, Kim JH, Kim JS, Kim M, Kim M, Kim S, Kim SH, Kirsch S, Kisel I, Kiselev S, Kisiel A, Klay JL, Klein J, Klein-Bösing C, Kliemant M, Klovning A, Kluge A, Knichel ML, Koch K, Köhler MK, Kolevatov R, Kolojvari A, Kondratiev V, Kondratyeva N, Konevskih A, Kornaś E, Don CKK, Kour R, Kowalski M, Kox S, Meethaleveedu GK, Kozlov K, Kral J, Králik I, Kramer F, Kraus I, Krawutschke T, Kretz M, Krivda M, Krizek F, Krumbhorn D, Krus M, Kryshen E, Krzewicki M, Kucheriaev Y, Kuhn C, Kuijer PG, Kurashvili P, Kurepin A, Kurepin AB, Kuryakin A, Kushpil S, Kushpil V, Kweon MJ, Kwon Y, La Rocca P, Ladrón de Guevara P, Lafage V, Lara C, Lardeux A, Larsen DT, Lazzeroni C, Le Bornec Y, Lea R, Lee KS, Lee SC, Lefèvre F, Lehnert J, Leistam L, Lenhardt M, Lenti V, Monzón IL, Vargas HL, Lévai P, Li X, Lien J, Lietava R, Lindal S, Lindenstruth V, Lippmann C, Lisa MA, Liu L, Loenne PI, Loggins VR, Loginov V, Lohn S, Loizides C, Loo KK, Lopez X, Noriega ML, Torres EL, Løvhøiden G, Lu XG, Luettig P, Lunardon M, Luparello G, Luquin L, Luzzi C, Ma K, Ma R, Madagodahettige-Don DM, Maevskaya A, Mager M, Mahapatra DP, Maire A, Mal'Kevich D, Malaev M, Cervantes IM, Malinina L, Malzacher P, Mamonov A, Manceau L, Mangotra L, Manko V, Manso F, Manzari V, Mao Y, Mareš J, Margagliotti GV, Margotti A, Marín A, Markert C, Martashvili I, Martinengo P, Martínez MI, Davalos AM, García GM, Martynov Y, Masciocchi S, Masera M, Masoni A, Massacrier L, Mastromarco M, Mastroserio A, Matthews ZL, Matyja A, Mayani D, Mayer C, Mazza G, Mazzoni MA, Meddi F, Menchaca-Rocha A, Lorenzo PM, Menis I, Pérez JM, Meres M, Mereu P, Miake Y, Midori J, Milano L, Milosevic J, Mischke A, Miśkowiec D, Mitu C, Mlynarz J, Mohanty AK, Mohanty B, Molnar L, Zetina LM, Monteno M, Montes E, Morando M, De Godoy DAM, Moretto S, Morsch A, Muccifora V, Mudnic E, Muhuri S, Müller H, Munhoz MG, Munoz J, Musa L, Musso A, Nandi BK, Nania R, Nappi E, Nattrass C, Navach F, Navin S, Nayak TK, Nazarenko S, Nazarov G, Nedosekin A, Nendaz F, Newby J, Nicassio M, Nielsen BS, Niida T, Nikolaev S, Nikolic V, Nikulin S, Nikulin V, Nilsen BS, Nilsson MS, Noferini F, Nooren G, Novitzky N, Nyanin A, Nyatha A, Nygaard C, Nystrand J, Obayashi H, Ochirov A, Oeschler H, Oh SK, Oleniacz J, Oppedisano C, Velasquez AO, Ortona G, Oskarsson A, Ostrowski P, Otterlund I, Otwinowski J, Oyama K, Ozawa K, Pachmayer Y, Pachr M, Padilla F, Pagano P, Jayarathna SP, Paić G, Painke F, Pajares C, Pal S, Pal SK, Palaha A, Palmeri A, Pappalardo GS, Park WJ, Patalakha DI, Paticchio V, Pavlinov A, Pawlak T, Peitzmann T, Peresunko D, Lara CEP, Perini D, Perrino D, Peryt W, Pesci A, Peskov V, Pestov Y, Peters AJ, Petráček V, Petran M, Petris M, Petrov P, Petrovici M, Petta C, Piano S, Piccotti A, Pikna M, Pillot P, Pinazza O, Pinsky L, Pitz N, Piuz F, Piyarathna DB, Platt R, Płoskoń M, Pluta J, Pocheptsov T, Pochybova S, Podesta-Lerma PLM, Poghosyan MG, Polák K, Polichtchouk B, Pop A, Porteboeuf S, Pospíšil V, Potukuchi B, Prasad SK, Preghenella R, Prino F, Pruneau CA, Pshenichnov I, Puddu G, Pulvirenti A, Punin V, Putiš M, Putschke J, Quercigh E, Qvigstad H, Rachevski A, Rademakers A, Rademakers O, Radomski S, Räihä TS, Rak J, Rakotozafindrabe A, Ramello L, Reyes AR, Rammler M, Raniwala R, Raniwala S, Räsänen SS, Read KF, Real J, Redlich K, Renfordt R, Reolon AR, Reshetin A, Rettig F, Revol JP, Reygers K, Ricaud H, Riccati L, Ricci RA, Richter M, Riedler P, Riegler W, Riggi F, Cahuantzi MR, Rohr D, Röhrich D, Romita R, Ronchetti F, Rosinský P, Rosnet P, Rossegger S, Rossi A, Roukoutakis F, Rousseau S, Roy C, Roy P, Montero AJR, Rui R, Rivetti A, Rusanov I, Ryabinkin E, Rybicki A, Sadovsky S, Safařík K, Sahoo R, Sahu PK, Saini J, Saiz P, Sakai S, Sakata D, Salgado CA, Samanta T, Sambyal S, Samsonov V, Castro XS, Sándor L, Sandoval A, Sano M, Sano S, Santo R, Santoro R, Sarkamo J, Saturnini P, Scapparone E, Scarlassara F, Scharenberg RP, Schiaua C, Schicker R, Schmidt C, Schmidt HR, Schreiner S, Schuchmann S, Schukraft J, Schutz Y, Schwarz K, Schweda K, Scioli G, Scomparin E, Scott PA, Scott R, Segato G, Selyuzhenkov I, Senyukov S, Seo J, Serci S, Serradilla E, Sevcenco A, Sgura I, Shabratova G, Shahoyan R, Sharma N, Sharma S, Shigaki K, Shimomura M, Shtejer K, Sibiriak Y, Siciliano M, Sicking E, Siemiarczuk T, Silenzi A, Silvermyr D, Simonetti G, Singaraju R, Singh R, Singhal V, Sinha BC, Sinha T, Sitar B, Sitta M, Skaali TB, Skjerdal K, Smakal R, Smirnov N, Snellings R, Søgaard C, Soloviev A, Soltz R, Son H, Song J, Song M, Soos C, Soramel F, Spyropoulou-Stassinaki M, Srivastava BK, Stachel J, Stan I, Stefanek G, Stefanini G, Steinbeck T, Steinpreis M, Stenlund E, Steyn G, Stocco D, Stock R, Stokkevag CH, Stolpovskiy M, Strmen P, Suaide AAP, Vásquez MAS, Sugitate T, Suire C, Sukhorukov M, Sumbera M, Susa T, Swoboda D, Symons TJM, de Toledo AS, Szarka I, Szostak A, Tagridis C, Takahashi J, Takaki JDT, Tauro A, Tavlet M, Muñoz GT, Telesca A, Terrevoli C, Thäder J, Thomas D, Thomas JH, Tieulent R, Timmins AR, Tlusty D, Toia A, Torii H, Toscano L, Tosello F, Traczyk T, Truesdale D, Trzaska WH, Tsuji T, Tumkin A, Turrisi R, Turvey AJ, Tveter TS, Ulery J, Ullaland K, Uras A, Urbán J, Urciuoli GM, Usai GL, Vacchi A, Vajzer M, Vala M, Palomo LV, Vallero S, van der Kolk N, van Leeuwen M, Vande Vyvre P, Vannucci L, Vargas A, Varma R, Vasileiou M, Vasiliev A, Vechernin V, Veldhoen M, Venaruzzo M, Vercellin E, Vergara S, Vernekohl DC, Vernet R, Verweij M, Vickovic L, Viesti G, Vikhlyantsev O, Vilakazi Z, Baillie OV, Vinogradov A, Vinogradov L, Vinogradov Y, Virgili T, Viyogi YP, Vodopyanov A, Voloshin K, Voloshin S, Volpe G, von Haller B, Vranic D, Øvrebekk G, Vrláková J, Vulpescu B, Vyushin A, Wagner B, Wagner V, Wan R, Wang D, Wang Y, Wang Y, Watanabe K, Wessels JP, Westerhoff U, Wiechula J, Wikne J, Wilde M, Wilk A, Wilk G, Williams MCS, Windelband B, Karampatsos LX, Yang H, Yang S, Yasnopolskiy S, Yi J, Yin Z, Yokoyama H, Yoo IK, Yu W, Yuan X, Yushmanov I, Zabrodin E, Zach C, Zampolli C, Zaporozhets S, Zarochentsev A, Závada P, Zaviyalov N, Zbroszczyk H, Zelnicek P, Zenin A, Zgura I, Zhalov M, Zhang X, Zhou D, Zichichi A, Zinovjev G, Zoccarato Y, Zynovyev M. Elliptic flow of charged particles in Pb-Pb collisions at sqrt[S(NN)] = 2.76 TeV. PHYSICAL REVIEW LETTERS 2010; 105:252302. [PMID: 21231580 DOI: 10.1103/physrevlett.105.252302] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Indexed: 05/30/2023]
Abstract
We report the first measurement of charged particle elliptic flow in Pb-Pb collisions at sqrt[S(NN)] =2.76 TeV with the ALICE detector at the CERN Large Hadron Collider. The measurement is performed in the central pseudorapidity region (|η|<0.8) and transverse momentum range 0.2<p t<5.0 GeV/c. The elliptic flow signal v₂, measured using the 4-particle correlation method, averaged over transverse momentum and pseudorapidity is 0.087 ± 0.002(stat) ± 0.003(syst) in the 40%-50% centrality class. The differential elliptic flow v₂ p t reaches a maximum of 0.2 near p t =3 GeV/c. Compared to RHIC Au-Au collisions at sqrt[S(NN)] 200 GeV, the elliptic flow increases by about 30%. Some hydrodynamic model predictions which include viscous corrections are in agreement with the observed increase.
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Aamodt K, Abelev B, Quintana AA, Adamová D, Adare AM, Aggarwal MM, Rinella GA, Agocs AG, Salazar SA, Ahammed Z, Masoodi AA, Ahmad N, Ahn SU, Akindinov A, Aleksandrov D, Alessandro B, Molina RA, Alici A, Alkin A, Aviña EA, Alt T, Altini V, Altinpinar S, Altsybeev I, Andrei C, Andronic A, Anguelov V, Anson C, Antičić T, Antinori F, Antonioli P, Aphecetche L, Appelshäuser H, Arbor N, Arcelli S, Arend A, Armesto N, Arnaldi R, Aronsson T, Arsene IC, Asryan A, Augustinus A, Averbeck R, Awes TC, Aystö J, Azmi MD, Bach M, Badalà A, Baek YW, Bagnasco S, Bailhache R, Bala R, Ferroli RB, Baldisseri A, Baldit A, Pedrosa FBDS, Bán J, Barbera R, Barile F, Barnaföldi GG, Barnby LS, Barret V, Bartke J, Basile M, Bastid N, Bathen B, Batigne G, Batyunya B, Baumann C, Bearden IG, Beck H, Belikov I, Bellini F, Bellwied R, Belmont-Moreno E, Beole S, Berceanu I, Bercuci A, Berdermann E, Berdnikov Y, Bergmann C, Betev L, Bhasin A, Bhati AK, Bianchi L, Bianchi N, Bianchin C, Bielčík J, Bielčíková J, Bilandzic A, Biolcati E, Blanc A, Blanco F, Blanco F, Blau D, Blume C, Boccioli M, Bock N, Bogdanov A, Bøggild H, Bogolyubsky M, Boldizsár L, Bombara M, Bombonati C, Book J, Borel H, Borissov A, Bortolin C, Bose S, Bossú F, Botje M, Böttger S, Boyer B, Braun-Munzinger P, Bravina L, Bregant M, Breitner T, Broz M, Brun R, Bruna E, Bruno GE, Budnikov D, Buesching H, Bugaiev K, Busch O, Buthelezi Z, Caffarri D, Cai X, Caines H, Villar EC, Camerini P, Roman VC, Romeo GC, Carena F, Carena W, Carminati F, Díaz AC, Caselle M, Castellanos JC, Catanescu V, Cavicchioli C, Cepila J, Cerello P, Chang B, Chapeland S, Charvet JL, Chattopadhyay S, Chattopadhyay S, Cherney M, Cheshkov C, Cheynis B, Chiavassa E, Barroso VC, Chinellato DD, Chochula P, Chojnacki M, Christakoglou P, Christensen CH, Christiansen P, Chujo T, Cicalo C, Cifarelli L, Cindolo F, Cleymans J, Coccetti F, Coffin JP, Coli S, Balbastre GC, Del Valle ZC, Constantin P, Contin G, Contreras JG, Cormier TM, Morales YC, Maldonado IC, Cortese P, Cosentino MR, Costa F, Cotallo ME, Crescio E, Crochet P, Cuautle E, Cunqueiro L, Erasmo GD, Dainese A, Dalsgaard HH, Danu A, Das D, Das I, Das K, Dash A, Dash S, De S, Moregula ADA, de Barros GOV, De Caro A, de Cataldo G, de Cuveland J, De Falco A, De Gruttola D, De Marco N, De Pasquale S, De Remigis R, de Rooij R, Debski PR, Sanchez EDC, Delagrange H, Mercado YD, Dellacasa G, Deloff A, Demanov V, Dénes E, Deppman A, Di Bari D, Di Giglio C, Di Liberto S, Di Mauro A, Di Nezza P, Dietel T, Divià R, Djuvsland Ø, Dobrin A, Dobrowolski T, Domínguez I, Dönigus B, Dordic O, Driga O, Dubey AK, Dubuisson J, Ducroux L, Dupieux P, Majumdar AKD, Majumdar MRD, Elia D, Emschermann D, Engel H, Erdal HA, Espagnon B, Estienne M, Esumi S, Evans D, Evrard S, Eyyubova G, Fabjan CW, Fabris D, Faivre J, Falchieri D, Fantoni A, Fasel M, Fearick R, Fedunov A, Fehlker D, Fekete V, Felea D, Feofilov G, Téllez AF, Ferretti A, Ferretti R, Figiel J, Figueredo MAS, Filchagin S, Fini R, Finogeev D, Fionda FM, Fiore EM, Floris M, Foertsch S, Foka P, Fokin S, Fragiacomo E, Fragkiadakis M, Frankenfeld U, Fuchs U, Furano F, Furget C, Girard MF, Gaardhøje JJ, Gadrat S, Gagliardi M, Gago A, Gallio M, Gangadharan DR, Ganoti P, Ganti MS, Garabatos C, Garcia-Solis E, Garishvili I, Gemme R, Gerhard J, Germain M, Geuna C, Gheata A, Gheata M, Ghidini B, Ghosh P, Gianotti P, Girard MR, Giraudo G, Giubellino P, Gladysz-Dziadus E, Glässel P, Gomez R, Ferreiro EG, Santos HG, González-Trueba LH, González-Zamora P, Gorbunov S, Gotovac S, Grabski V, Grajcarek R, Grelli A, Grigoras A, Grigoras C, Grigoriev V, Grigoryan A, Grigoryan S, Grinyov B, Grion N, Gros P, Grosse-Oetringhaus JF, Grossiord JY, Grosso R, Guber F, Guernane R, Gutierrez CG, Guerzoni B, Gulbrandsen K, Gunji T, Gupta A, Gupta R, Gutbrod H, Haaland Ø, Hadjidakis C, Haiduc M, Hamagaki H, Hamar G, Harris JW, Hartig M, Hasch D, Hasegan D, Hatzifotiadou D, Hayrapetyan A, Heide M, Heinz M, Helstrup H, Herghelegiu A, Hernández C, Corral GH, Herrmann N, Hetland KF, Hicks B, Hille PT, Hippolyte B, Horaguchi T, Hori Y, Hristov P, Hřivnáčová I, Huang M, Huber S, Humanic TJ, Hwang DS, Ichou R, Ilkaev R, Ilkiv I, Inaba M, Incani E, Innocenti GM, Innocenti PG, Ippolitov M, Irfan M, Ivan C, Ivanov A, Ivanov M, Ivanov V, Jachołkowski A, Jacobs PM, Jancurová L, Jangal S, Janik R, Jena S, Jirden L, Jones GT, Jones PG, Jovanović P, Jung H, Jung W, Jusko A, Kalcher S, Kaliňák P, Kalisky M, Kalliokoski T, Kalweit A, Kamermans R, Kanaki K, Kang E, Kang JH, Kaplin V, Karavichev O, Karavicheva T, Karpechev E, Kazantsev A, Kebschull U, Keidel R, Khan MM, Khan SA, Khanzadeev A, Kharlov Y, Kileng B, Kim DJ, Kim DS, Kim DW, Kim HN, Kim JH, Kim JS, Kim M, Kim M, Kim S, Kim SH, Kirsch S, Kisel I, Kiselev S, Kisiel A, Klay JL, Klein J, Klein-Bösing C, Kliemant M, Klovning A, Kluge A, Knichel ML, Koch K, Köhler MK, Kolevatov R, Kolojvari A, Kondratiev V, Kondratyeva N, Konevskih A, Kornaś E, Don CKK, Kour R, Kowalski M, Kox S, Meethaleveedu GK, Kozlov K, Kral J, Králik I, Kramer F, Kraus I, Krawutschke T, Kretz M, Krivda M, Krizek F, Krumbhorn D, Krus M, Kryshen E, Krzewicki M, Kucheriaev Y, Kuhn C, Kuijer PG, Kurashvili P, Kurepin A, Kurepin AB, Kuryakin A, Kushpil S, Kushpil V, Kweon MJ, Kwon Y, La Rocca P, de Guevara PL, Lafage V, Lara C, Lardeux A, Larsen DT, Lazzeroni C, Le Bornec Y, Lea R, Lee KS, Lee SC, Lefèvre F, Lehnert J, Leistam L, Lenhardt M, Lenti V, Monzón IL, Vargas HL, Lévai P, Li X, Lien J, Lietava R, Lindal S, Lindenstruth V, Lippmann C, Lisa MA, Liu L, Loenne PI, Loggins VR, Loginov V, Lohn S, Loizides C, Loo KK, Lopez X, Noriega ML, Torres EL, Løvhøiden G, Lu XG, Luettig P, Lunardon M, Luparello G, Luquin L, Luzzi C, Ma K, Ma R, Madagodahettige-Don DM, Maevskaya A, Mager M, Mahapatra DP, Maire A, Mal'Kevich D, Malaev M, Cervantes IM, Malinina L, Malzacher P, Mamonov A, Manceau L, Mangotra L, Manko V, Manso F, Manzari V, Mao Y, Mareš J, Margagliotti GV, Margotti A, Marín A, Markert C, Martashvili I, Martinengo P, Martínez MI, Davalos AM, García GM, Martynov Y, Masciocchi S, Masera M, Masoni A, Massacrier L, Mastromarco M, Mastroserio A, Matthews ZL, Matyja A, Mayani D, Mayer C, Mazza G, Mazzoni MA, Meddi F, Menchaca-Rocha A, Lorenzo PM, Menis I, Pérez JM, Meres M, Mereu P, Miake Y, Midori J, Milano L, Milosevic J, Mischke A, Miśkowiec D, Mitu C, Mlynarz J, Mohanty AK, Mohanty B, Molnar L, Zetina LM, Monteno M, Montes E, Morando M, De Godoy DAM, Moretto S, Morsch A, Muccifora V, Mudnic E, Muhuri S, Müller H, Munhoz MG, Munoz J, Musa L, Musso A, Nandi BK, Nania R, Nappi E, Nattrass C, Navach F, Navin S, Nayak TK, Nazarenko S, Nazarov G, Nedosekin A, Nendaz F, Newby J, Nicassio M, Nielsen BS, Niida T, Nikolaev S, Nikolic V, Nikulin S, Nikulin V, Nilsen BS, Nilsson MS, Noferini F, Nooren G, Novitzky N, Nyanin A, Nyatha A, Nygaard C, Nystrand J, Obayashi H, Ochirov A, Oeschler H, Oh SK, Oleniacz J, Oppedisano C, Velasquez AO, Ortona G, Oskarsson A, Ostrowski P, Otterlund I, Otwinowski J, Oyama K, Ozawa K, Pachmayer Y, Pachr M, Padilla F, Pagano P, Jayarathna SP, Paić G, Painke F, Pajares C, Pal S, Pal SK, Palaha A, Palmeri A, Pappalardo GS, Park WJ, Patalakha DI, Paticchio V, Pavlinov A, Pawlak T, Peitzmann T, Peresunko D, Lara CEP, Perini D, Perrino D, Peryt W, Pesci A, Peskov V, Pestov Y, Peters AJ, Petráček V, Petran M, Petris M, Petrov P, Petrovici M, Petta C, Piano S, Piccotti A, Pikna M, Pillot P, Pinazza O, Pinsky L, Pitz N, Piuz F, Piyarathna DB, Platt R, Płoskoń M, Pluta J, Pocheptsov T, Pochybova S, Podesta-Lerma PLM, Poghosyan MG, Polák K, Polichtchouk B, Pop A, Porteboeuf S, Pospíšil V, Potukuchi B, Prasad SK, Preghenella R, Prino F, Pruneau CA, Pshenichnov I, Puddu G, Pulvirenti A, Punin V, Putiš M, Putschke J, Quercigh E, Qvigstad H, Rachevski A, Rademakers A, Rademakers O, Radomski S, Räihä TS, Rak J, Rakotozafindrabe A, Ramello L, Ramírez Reyes A, Rammler M, Raniwala R, Raniwala S, Räsänen SS, Read KF, Real J, Redlich K, Renfordt R, Reolon AR, Reshetin A, Rettig F, Revol JP, Reygers K, Ricaud H, Riccati L, Ricci RA, Richter M, Riedler P, Riegler W, Riggi F, Cahuantzi MR, Rohr D, Röhrich D, Romita R, Ronchetti F, Rosinský P, Rosnet P, Rossegger S, Rossi A, Roukoutakis F, Rousseau S, Roy C, Roy P, Montero AJR, Rui R, Rivetti A, Rusanov I, Ryabinkin E, Rybicki A, Sadovsky S, Safařík K, Sahoo R, Sahu PK, Saini J, Saiz P, Sakai S, Sakata D, Salgado CA, Samanta T, Sambyal S, Samsonov V, Castro XS, Sándor L, Sandoval A, Sano M, Sano S, Santo R, Santoro R, Sarkamo J, Saturnini P, Scapparone E, Scarlassara F, Scharenberg RP, Schiaua C, Schicker R, Schmidt C, Schmidt HR, Schreiner S, Schuchmann S, Schukraft J, Schutz Y, Schwarz K, Schweda K, Scioli G, Scomparin E, Scott PA, Scott R, Segato G, Selyuzhenkov I, Senyukov S, Seo J, Serci S, Serradilla E, Sevcenco A, Sgura I, Shabratova G, Shahoyan R, Sharma N, Sharma S, Shigaki K, Shimomura M, Shtejer K, Sibiriak Y, Siciliano M, Sicking E, Siemiarczuk T, Silenzi A, Silvermyr D, Simonetti G, Singaraju R, Singh R, Singhal V, Sinha BC, Sinha T, Sitar B, Sitta M, Skaali TB, Skjerdal K, Smakal R, Smirnov N, Snellings R, Søgaard C, Soloviev A, Soltz R, Son H, Song J, Song M, Soos C, Soramel F, Spyropoulou-Stassinaki M, Srivastava BK, Stachel J, Stan I, Stefanek G, Stefanini G, Steinbeck T, Steinpreis M, Stenlund E, Steyn G, Stocco D, Stock R, Stokkevag CH, Stolpovskiy M, Strmen P, Suaide AAP, Vásquez MAS, Sugitate T, Suire C, Sukhorukov M, Sumbera M, Susa T, Swoboda D, Symons TJM, de Toledo AS, Szarka I, Szostak A, Tagridis C, Takahashi J, Takaki JDT, Tauro A, Tavlet M, Muñoz GT, Telesca A, Terrevoli C, Thäder J, Thomas D, Thomas JH, Tieulent R, Timmins AR, Tlusty D, Toia A, Torii H, Toscano L, Tosello F, Traczyk T, Truesdale D, Trzaska WH, Tsuji T, Tumkin A, Turrisi R, Turvey AJ, Tveter TS, Ulery J, Ullaland K, Uras A, Urbán J, Urciuoli GM, Usai GL, Vacchi A, Vajzer M, Vala M, Palomo LV, Vallero S, van der Kolk N, van Leeuwen M, Vande Vyvre P, Vannucci L, Vargas A, Varma R, Vasileiou M, Vasiliev A, Vechernin V, Veldhoen M, Venaruzzo M, Vercellin E, Vergara S, Vernekohl DC, Vernet R, Verweij M, Vickovic L, Viesti G, Vikhlyantsev O, Vilakazi Z, Baillie OV, Vinogradov A, Vinogradov L, Vinogradov Y, Virgili T, Viyogi YP, Vodopyanov A, Voloshin K, Voloshin S, Volpe G, von Haller B, Vranic D, Øvrebekk G, Vrláková J, Vulpescu B, Vyushin A, Wagner B, Wagner V, Wan R, Wang D, Wang Y, Wang Y, Watanabe K, Wessels JP, Westerhoff U, Wiechula J, Wikne J, Wilde M, Wilk A, Wilk G, Williams MCS, Windelband B, Karampatsos LX, Yang H, Yang S, Yasnopolskiy S, Yi J, Yin Z, Yokoyama H, Yoo IK, Yu W, Yuan X, Yushmanov I, Zabrodin E, Zach C, Zampolli C, Zaporozhets S, Zarochentsev A, Závada P, Zaviyalov N, Zbroszczyk H, Zelnicek P, Zenin A, Zgura I, Zhalov M, Zhang X, Zhou D, Zichichi A, Zinovjev G, Zoccarato Y, Zynovyev M. Charged-particle multiplicity density at midrapidity in central Pb-Pb collisions at sqrt[S(NN)] = 2.76 TeV. PHYSICAL REVIEW LETTERS 2010; 105:252301. [PMID: 21231579 DOI: 10.1103/physrevlett.105.252301] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Indexed: 05/30/2023]
Abstract
The first measurement of the charged-particle multiplicity density at midrapidity in Pb-Pb collisions at a center-of-mass energy per nucleon pair √ S NN = 2.76 TeV is presented. For an event sample corresponding to the most central 5% of the hadronic cross section, the pseudorapidity density of primary charged particles at midrapidity is 1584 ± 4(stat) ± 76(syst), which corresponds to 8.3 ± 0.4(syst) per participating nucleon pair. This represents an increase of about a factor 1.9 relative to pp collisions at similar collision energies, and about a factor 2.2 to central Au-Au collisions at √ S NN = 2.76 TeV. This measurement provides the first experimental constraint for models of nucleus-nucleus collisions at LHC energies.
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Aamodt K, Abel N, Abeysekara U, Abrahantes Quintana A, Abramyan A, Adamová D, Aggarwal MM, Aglieri Rinella G, Agocs AG, Aguilar Salazar S, Ahammed Z, Ahmad A, Ahmad N, Ahn SU, Akimoto R, Akindinov A, Aleksandrov D, Alessandro B, Alfaro Molina R, Alici A, Almaráz Aviña E, Alme J, Alt T, Altini V, Altinpinar S, Andrei C, Andronic A, Anelli G, Angelov V, Anson C, Anticić T, Antinori F, Antinori S, Antipin K, Antończyk D, Antonioli P, Anzo A, Aphecetche L, Appelshäuser H, Arcelli S, Arceo R, Arend A, Armesto N, Arnaldi R, Aronsson T, Arsene IC, Asryan A, Augustinus A, Averbeck R, Awes TC, Aystö J, Azmi MD, Bablok S, Bach M, Badalà A, Baek YW, Bagnasco S, Bailhache R, Bala R, Baldisseri A, Baldit A, Bán J, Barbera R, Barnaföldi GG, Barnby LS, Barret V, Bartke J, Barile F, Basile M, Basmanov V, Bastid N, Bathen B, Batigne G, Batyunya B, Baumann C, Bearden IG, Becker B, Belikov I, Bellwied R, Belmont-Moreno E, Belogianni A, Benhabib L, Beole S, Berceanu I, Bercuci A, Berdermann E, Berdnikov Y, Betev L, Bhasin A, Bhati AK, Bianchi L, Bianchi N, Bianchin C, Bielcík J, Bielcíková J, Bilandzic A, Bimbot L, Biolcati E, Blanc A, Blanco F, Blanco F, Blau D, Blume C, Boccioli M, Bock N, Bogdanov A, Bøggild H, Bogolyubsky M, Bohm J, Boldizsár L, Bombara M, Bombonati C, Bondila M, Borel H, Borisov A, Bortolin C, Bose S, Bosisio L, Bossú F, Botje M, Böttger S, Bourdaud G, Boyer B, Braun M, Braun-Munzinger P, Bravina L, Bregant M, Breitner T, Bruckner G, Brun R, Bruna E, Bruno GE, Budnikov D, Buesching H, Buncic P, Busch O, Buthelezi Z, Caffarri D, Cai X, Caines H, Calvo E, Camacho E, Camerini P, Campbell M, Canoa Roman V, Capitani GP, Cara Romeo G, Carena F, Carena W, Carminati F, Casanova Díaz A, Caselle M, Castillo Castellanos J, Castillo Hernandez JF, Catanescu V, Cattaruzza E, Cavicchioli C, Cerello P, Chambert V, Chang B, Chapeland S, Charpy A, Charvet JL, Chattopadhyay S, Chattopadhyay S, Cherney M, Cheshkov C, Cheynis B, Chiavassa E, Chibante Barroso V, Chinellato DD, Chochula P, Choi K, Chojnacki M, Christakoglou P, Christensen CH, Christiansen P, Chujo T, Chuman F, Cicalo C, Cifarelli L, Cindolo F, Cleymans J, Cobanoglu O, Coffin JP, Coli S, Colla A, Conesa Balbastre G, Conesa Del Valle Z, Conner ES, Constantin P, Contin G, Contreras JG, Corrales Morales Y, Cormier TM, Cortese P, Cortés Maldonado I, Cosentino MR, Costa F, Cotallo ME, Crescio E, Crochet P, Cuautle E, Cunqueiro L, Cussonneau J, Dainese A, Dalsgaard HH, Danu A, Das I, Dash A, Dash S, de Barros GOV, De Caro A, de Cataldo G, de Cuveland J, De Falco A, De Gaspari M, de Groot J, De Gruttola D, De Marco N, De Pasquale S, De Remigis R, de Rooij R, de Vaux G, Delagrange H, Delgado Y, Dellacasa G, Deloff A, Demanov V, Dénes E, Deppman A, D'Erasmo G, Derkach D, Devaux A, Di Bari D, Di Giglio C, Di Liberto S, Di Mauro A, Di Nezza P, Dialinas M, Díaz L, Díaz R, Dietel T, Divià R, Djuvsland O, Dobretsov V, Dobrin A, Dobrowolski T, Dönigus B, Domínguez I, Don DMM, Dordic O, Dubey AK, Dubuisson J, Ducroux L, Dupieux P, Dutta Majumdar AK, Dutta Majumdar MR, Elia D, Emschermann D, Enokizono A, Espagnon B, Estienne M, Esumi S, Evans D, Evrard S, Eyyubova G, Fabjan CW, Fabris D, Faivre J, Falchieri D, Fantoni A, Fasel M, Fateev O, Fearick R, Fedunov A, Fehlker D, Fekete V, Felea D, Fenton-Olsen B, Feofilov G, Fernández Téllez A, Ferreiro EG, Ferretti A, Ferretti R, Figueredo MAS, Filchagin S, Fini R, Fionda FM, Fiore EM, Floris M, Fodor Z, Foertsch S, Foka P, Fokin S, Formenti F, Fragiacomo E, Fragkiadakis M, Frankenfeld U, Frolov A, Fuchs U, Furano F, Furget C, Fusco Girard M, Gaardhøje JJ, Gadrat S, Gagliardi M, Gago A, Gallio M, Ganoti P, Ganti MS, Garabatos C, García Trapaga C, Gebelein J, Gemme R, Germain M, Gheata A, Gheata M, Ghidini B, Ghosh P, Giraudo G, Giubellino P, Gladysz-Dziadus E, Glasow R, Glässel P, Glenn A, Gómez Jiménez R, González Santos H, González-Trueba LH, González-Zamora P, Gorbunov S, Gorbunov Y, Gotovac S, Gottschlag H, Grabski V, Grajcarek R, Grelli A, Grigoras A, Grigoras C, Grigoriev V, Grigoryan A, Grigoryan S, Grinyov B, Grion N, Gros P, Grosse-Oetringhaus JF, Grossiord JY, Grosso R, Guber F, Guernane R, Guerra C, Guerzoni B, Gulbrandsen K, Gulkanyan H, Gunji T, Gupta A, Gupta R, Gustafsson HA, Gutbrod H, Haaland O, Hadjidakis C, Haiduc M, Hamagaki H, Hamar G, Hamblen J, Han BH, Harris JW, Hartig M, Harutyunyan A, Hasch D, Hasegan D, Hatzifotiadou D, Hayrapetyan A, Heide M, Heinz M, Helstrup H, Herghelegiu A, Hernández C, Herrera Corral G, Herrmann N, Hetland KF, Hicks B, Hiei A, Hille PT, Hippolyte B, Horaguchi T, Hori Y, Hristov P, Hrivnácová I, Hu S, Huang M, Huber S, Humanic TJ, Hutter D, Hwang DS, Ichou R, Ilkaev R, Ilkiv I, Inaba M, Innocenti PG, Ippolitov M, Irfan M, Ivan C, Ivanov A, Ivanov M, Ivanov V, Iwasaki T, Jachołkowski A, Jacobs P, Jancurová L, Jangal S, Janik R, Jena C, Jena S, Jirden L, Jones GT, Jones PG, Jovanović P, Jung H, Jung W, Jusko A, Kaidalov AB, Kalcher S, Kalinák P, Kalisky M, Kalliokoski T, Kalweit A, Kamal A, Kamermans R, Kanaki K, Kang E, Kang JH, Kapitan J, Kaplin V, Kapusta S, Karavichev O, Karavicheva T, Karpechev E, Kazantsev A, Kebschull U, Keidel R, Khan MM, Khan SA, Khanzadeev A, Kharlov Y, Kikola D, Kileng B, Kim DJ, Kim DS, Kim DW, Kim HN, Kim J, Kim JH, Kim JS, Kim M, Kim M, Kim SH, Kim S, Kim Y, Kirsch S, Kisel I, Kiselev S, Kisiel A, Klay JL, Klein J, Klein-Bösing C, Kliemant M, Klovning A, Kluge A, Knichel ML, Kniege S, Koch K, Kolevatov R, Kolojvari A, Kondratiev V, Kondratyeva N, Konevskih A, Kornaś E, Kour R, Kowalski M, Kox S, Kozlov K, Kral J, Králik I, Kramer F, Kraus I, Kravcáková A, Krawutschke T, Krivda M, Krumbhorn D, Krus M, Kryshen E, Krzewicki M, Kucheriaev Y, Kuhn C, Kuijer PG, Kumar L, Kumar N, Kupczak R, Kurashvili P, Kurepin A, Kurepin AN, Kuryakin A, Kushpil S, Kushpil V, Kutouski M, Kvaerno H, Kweon MJ, Kwon Y, La Rocca P, Lackner F, Ladrón de Guevara P, Lafage V, Lal C, Lara C, Larsen DT, Laurenti G, Lazzeroni C, Le Bornec Y, Le Bris N, Lee H, Lee KS, Lee SC, Lefèvre F, Lenhardt M, Leistam L, Lehnert J, Lenti V, León H, León Monzón I, León Vargas H, Lévai P, Li X, Li Y, Lietava R, Lindal S, Lindenstruth V, Lippmann C, Lisa MA, Liu L, Loginov V, Lohn S, Lopez X, López Noriega M, López-Ramírez R, López Torres E, Løvhøiden G, Lozea Feijo Soares A, Lu S, Lunardon M, Luparello G, Luquin L, Lutz JR, Ma K, Ma R, Madagodahettige-Don DM, Maevskaya A, Mager M, Mahapatra DP, Maire A, Makhlyueva I, Mal'kevich D, Malaev M, Malagalage KJ, Maldonado Cervantes I, Malek M, Malkiewicz T, Malzacher P, Mamonov A, Manceau L, Mangotra L, Manko V, Manso F, Manzari V, Mao Y, Mares J, Margagliotti GV, Margotti A, Marín A, Martashvili I, Martinengo P, Martínez Hernández MI, Martínez Davalos A, Martínez García G, Maruyama Y, Marzari Chiesa A, Masciocchi S, Masera M, Masetti M, Masoni A, Massacrier L, Mastromarco M, Mastroserio A, Matthews ZL, Matyja A, Mayani D, Mazza G, Mazzoni MA, Meddi F, Menchaca-Rocha A, Mendez Lorenzo P, Meoni M, Mercado Pérez J, Mereu P, Miake Y, Michalon A, Miftakhov N, Milano L, Milosevic J, Minafra F, Mischke A, Miśkowiec D, Mitu C, Mizoguchi K, Mlynarz J, Mohanty B, Molnar L, Mondal MM, Montaño Zetina L, Monteno M, Montes E, Morando M, Moretto S, Morsch A, Moukhanova T, Muccifora V, Mudnic E, Muhuri S, Müller H, Munhoz MG, Munoz J, Musa L, Musso A, Nandi BK, Nania R, Nappi E, Navach F, Navin S, Nayak TK, Nazarenko S, Nazarov G, Nedosekin A, Nendaz F, Newby J, Nianine A, Nicassio M, Nielsen BS, Nikolaev S, Nikolic V, Nikulin S, Nikulin V, Nilsen BS, Nilsson MS, Noferini F, Nomokonov P, Nooren G, Novitzky N, Nyatha A, Nygaard C, Nyiri A, Nystrand J, Ochirov A, Odyniec G, Oeschler H, Oinonen M, Okada K, Okada Y, Oldenburg M, Oleniacz J, Oppedisano C, Orsini F, Ortiz Velasquez A, Ortona G, Oskarsson A, Osmic F, Osterman L, Ostrowski P, Otterlund I, Otwinowski J, Ovrebekk G, Oyama K, Ozawa K, Pachmayer Y, Pachr M, Padilla F, Pagano P, Paić G, Painke F, Pajares C, Pal S, Pal SK, Palaha A, Palmeri A, Panse R, Papikyan V, Pappalardo GS, Park WJ, Pastircák B, Pastore C, Paticchio V, Pavlinov A, Pawlak T, Peitzmann T, Pepato A, Pereira H, Peressounko D, Pérez C, Perini D, Perrino D, Peryt W, Peschek J, Pesci A, Peskov V, Pestov Y, Peters AJ, Petrácek V, Petridis A, Petris M, Petrov P, Petrovici M, Petta C, Peyré J, Piano S, Piccotti A, Pikna M, Pillot P, Pinazza O, Pinsky L, Pitz N, Piuz F, Platt R, Płoskoń M, Pluta J, Pocheptsov T, Pochybova S, Podesta Lerma PLM, Poggio F, Poghosyan MG, Polák K, Polichtchouk B, Polozov P, Polyakov V, Pommeresch B, Pop A, Posa F, Pospísil V, Potukuchi B, Pouthas J, Prasad SK, Preghenella R, Prino F, Pruneau CA, Pshenichnov I, Puddu G, Pujahari P, Pulvirenti A, Punin A, Punin V, Putis M, Putschke J, Quercigh E, Rachevski A, Rademakers A, Radomski S, Räihä TS, Rak J, Rakotozafindrabe A, Ramello L, Ramírez Reyes A, Rammler M, Raniwala R, Raniwala S, Räsänen SS, Rashevskaya I, Rath S, Read KF, Real JS, Redlich K, Renfordt R, Reolon AR, Reshetin A, Rettig F, Revol JP, Reygers K, Ricaud H, Riccati L, Ricci RA, Richter M, Riedler P, Riegler W, Riggi F, Rivetti A, Rodriguez Cahuantzi M, Røed K, Röhrich D, Román López S, Romita R, Ronchetti F, Rosinský P, Rosnet P, Rossegger S, Rossi A, Roukoutakis F, Rousseau S, Roy C, Roy P, Rubio-Montero AJ, Rui R, Rusanov I, Russo G, Ryabinkin E, Rybicki A, Sadovsky S, Safarík K, Sahoo R, Saini J, Saiz P, Sakata D, Salgado CA, Salgueiro Domingues da Silva R, Salur S, Samanta T, Sambyal S, Samsonov V, Sándor L, Sandoval A, Sano M, Sano S, Santo R, Santoro R, Sarkamo J, Saturnini P, Scapparone E, Scarlassara F, Scharenberg RP, Schiaua C, Schicker R, Schindler H, Schmidt C, Schmidt HR, Schossmaier K, Schreiner S, Schuchmann S, Schukraft J, Schutz Y, Schwarz K, Schweda K, Scioli G, Scomparin E, Scott PA, Segato G, Semenov D, Senyukov S, Seo J, Serci S, Serkin L, Serradilla E, Sevcenco A, Sgura I, Shabratova G, Shahoyan R, Sharkov G, Sharma N, Sharma S, Shigaki K, Shimomura M, Shtejer K, Sibiriak Y, Siciliano M, Sicking E, Siddi E, Siemiarczuk T, Silenzi A, Silvermyr D, Simili E, Simonetti G, Singaraju R, Singh R, Singhal V, Sinha BC, Sinha T, Sitar B, Sitta M, Skaali TB, Skjerdal K, Smakal R, Smirnov N, Snellings R, Snow H, Søgaard C, Soloviev A, Soltveit HK, Soltz R, Sommer W, Son CW, Son H, Song M, Soos C, Soramel F, Soyk D, Spyropoulou-Stassinaki M, Srivastava BK, Stachel J, Staley F, Stan E, Stefanek G, Stefanini G, Steinbeck T, Stenlund E, Steyn G, Stocco D, Stock R, Stolpovsky P, Strmen P, Suaide AAP, Subieta Vásquez MA, Sugitate T, Suire C, Sumbera M, Susa T, Swoboda D, Symons J, Szanto de Toledo A, Szarka I, Szostak A, Szuba M, Tadel M, Tagridis C, Takahara A, Takahashi J, Tanabe R, Tapia Takaki JD, Taureg H, Tauro A, Tavlet M, Tejeda Muñoz G, Telesca A, Terrevoli C, Thäder J, Tieulent R, Tlusty D, Toia A, Tolyhy T, Torcato de Matos C, Torii H, Torralba G, Toscano L, Tosello F, Tournaire A, Traczyk T, Tribedy P, Tröger G, Truesdale D, Trzaska WH, Tsiledakis G, Tsilis E, Tsuji T, Tumkin A, Turrisi R, Turvey A, Tveter TS, Tydesjö H, Tywoniuk K, Ulery J, Ullaland K, Uras A, Urbán J, Urciuoli GM, Usai GL, Vacchi A, Vala M, Valencia Palomo L, Vallero S, van der Kolk N, Vande Vyvre P, van Leeuwen M, Vannucci L, Vargas A, Varma R, Vasiliev A, Vassiliev I, Vasileiou M, Vechernin V, Venaruzzo M, Vercellin E, Vergara S, Vernet R, Verweij M, Vetlitskiy I, Vickovic L, Viesti G, Vikhlyantsev O, Vilakazi Z, Villalobos Baillie O, Vinogradov A, Vinogradov L, Vinogradov Y, Virgili T, Viyogi YP, Vodopianov A, Voloshin K, Voloshin S, Volpe G, von Haller B, Vranic D, Vrláková J, Vulpescu B, Wagner B, Wagner V, Wallet L, Wan R, Wang D, Wang Y, Wang Y, Watanabe K, Wen Q, Wessels J, Westerhoff U, Wiechula J, Wikne J, Wilk A, Wilk G, Williams MCS, Willis N, Windelband B, Xu C, Yang C, Yang H, Yasnopolskiy S, Yermia F, Yi J, Yin Z, Yokoyama H, Yoo IK, Yuan X, Yurevich V, Yushmanov I, Zabrodin E, Zagreev B, Zalite A, Zampolli C, Zanevsky Y, Zaporozhets S, Zarochentsev A, Závada P, Zbroszczyk H, Zelnicek P, Zenin A, Zepeda A, Zgura I, Zhalov M, Zhang X, Zhou D, Zhou S, Zhu J, Zichichi A, Zinchenko A, Zinovjev G, Zoccarato Y, Zychácek V, Zynovyev M. Midrapidity antiproton-to-proton ratio in pp collisons at sqrt[s]=0.9 and 7 TeV measured by the ALICE experiment. PHYSICAL REVIEW LETTERS 2010; 105:072002. [PMID: 20868032 DOI: 10.1103/physrevlett.105.072002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Indexed: 05/29/2023]
Abstract
The ratio of the yields of antiprotons to protons in pp collisions has been measured by the ALICE experiment at sqrt[s]=0.9 and 7 TeV during the initial running periods of the Large Hadron Collider. The measurement covers the transverse momentum interval 0.45<p_{t}<1.05 GeV/c and rapidity |y|<0.5. The ratio is measured to be R_{|y|<0.5}=0.957±0.006(stat)±0.014(syst) at 0.9 TeV and R_{|y|<0.5}=0.991±0.005(stat)±0.014(syst) at 7 TeV and it is independent of both rapidity and transverse momentum. The results are consistent with the conventional model of baryon-number transport and set stringent limits on any additional contributions to baryon-number transfer over very large rapidity intervals in pp collisions.
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Bréban S, Padilla F, Fujisawa Y, Mano I, Matsukawa M, Benhamou CL, Otani T, Laugier P, Chappard C. Trabecular and cortical bone separately assessed at radius with a new ultrasound device, in a young adult population with various physical activities. Bone 2010; 46:1620-5. [PMID: 20230926 DOI: 10.1016/j.bone.2010.03.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Revised: 01/27/2010] [Accepted: 03/04/2010] [Indexed: 11/15/2022]
Abstract
The aim was to evaluate a new ultrasound device in a young adult population and to assess its reproducibility via comparison to DXA measurements and geometrical measurements from high-resolution radiographs. Ninety-three subjects aged between 20 and 51 years were recruited and divided into four groups according to their gender and physical activity status: 22 male athletes, 19 male controls, 21 female athletes, and 31 female controls. Ultrasonic measurements were assessed by the prototype LD-100 (Oyo Electric Co., Kyoto, Japan) on the dominant distal radius. Attenuation in the radius (dB), cortical bone thickness (mm), radius thickness (mm), mass density of cancellous bone (mg/cm(3)), and elasticity (GPa) of cancellous bone were obtained. BMD was measured by DXA at the dominant distal radius. Radius images were obtained with a direct high-resolution digital X-ray device (BMA, D(3)A Medical Systems), and radius and cortical thicknesses were estimated using a specific software (ImageJ, Bethesda, USA), in an area site-matched with LD-100. There was a significant positive correlation between site-matched BMD measurement and LD-100 parameters (p<0.004), X-ray radius thickness, and LD-100 parameters except elasticity (p<0.05, r>0.32), X-ray cortical thickness and LD-100 attenuation and cortical thickness (p<0.01). A significantly higher attenuation, cortical and radius thicknesses were found in athletes compared to controls (p<0.05). The radius thickness measured on radiographs was significantly higher in athletes versus controls in both sexes, and cortical thickness was significantly higher in male athletes versus controls. These data suggest a positive influence of physical activity on bone cortical measurements. This study also confirmed the particular interest of bone assessment by ultrasound.
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Barkmann R, Dencks S, Laugier P, Padilla F, Brixen K, Ryg J, Seekamp A, Mahlke L, Bremer A, Heller M, Glüer CC. Femur ultrasound (FemUS)--first clinical results on hip fracture discrimination and estimation of femoral BMD. Osteoporos Int 2010; 21:969-76. [PMID: 19693640 DOI: 10.1007/s00198-009-1037-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2009] [Accepted: 07/27/2009] [Indexed: 11/24/2022]
Abstract
SUMMARY A quantitative ultrasound (QUS) device for measurements at the proximal femur was developed and tested in vivo (Femur Ultrasound Scanner, FemUS). Hip fracture discrimination was as good as for DXA, and a high correlation with hip BMD was achieved. Our results show promise for enhanced QUS-based assessment of osteoporosis. INTRODUCTION Dual X-ray absorptiometry (DXA) at the femur is the best predictor of hip fractures, better than DXA measurements at other sites. Calcaneal quantitative ultrasound (QUS) can be used to estimate the general osteoporotic fracture risk, but no femoral QUS measurement has been introduced yet. We developed a QUS scanner for measurements at the femur (Femur Ultrasound Scanner, FemUS) and tested its in vivo performance. METHODS Using the FemUS device, we obtained femoral QUS and DXA on 32 women with recent hip fractures and 30 controls. Fracture discrimination and the correlation with femur bone mineral density (BMD) were assessed. RESULTS Hip fracture discrimination using the FemUS device was at least as good as with hip DXA and calcaneal QUS. Significant correlations with total hip bone mineral density were found with a correlation coefficient R (2) up to 0.72 and a residual error of about one half of a T-score in BMD. CONCLUSIONS QUS measurements at the proximal femur are feasible and show a good performance for hip fracture discrimination. Given the promising results, this laboratory prototype should be reengineered to a clinical applicable instrument. Our results show promise for further enhancement of QUS-based assessment of osteoporosis.
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Vastel L, Masse C, Mesnil P, Crozier E, Padilla F, Laugier P, Mitton D, Courpied JP. Comparative ultrasound evaluation of human trabecular bone graft properties after treatment with different sterilization procedures. J Biomed Mater Res B Appl Biomater 2009; 90:430-7. [PMID: 19130613 DOI: 10.1002/jbm.b.31302] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
New sterilization methods for human bone are likely to affect the mechanical properties of human cancellous grafts. These mechanical properties dictate the short- and mid-term results of the orthopedic procedure. The aim of this study was to compare the effects on bone mechanical properties, as assessed by ultrasound velocity, of different sterilization methods used under similar conditions: bleach and sublimation, humid heat, successive baths of physiological saline with osmotic detersion, and CO(2) in the supercritical phase. Alterations in mechanical properties were small with CO(2) (velocity change: -2%) and humid heat (-2.5%). Osmotic detersion had a significant but moderate effect (-4.7%). The -9% change with the protocol involving bleach suggested a greater than 30% decrease in load to failure, based on earlier studies. Gamma irradiation of defatted trabecular allografts, in a dose of 10 or 25 KGy, produced no significant changes in ultrasound velocity. Powerful protein denaturants used in sterilization protocols substantially alter the mechanical resistance of the grafts, which may jeopardize the orthopedic procedure.
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Haïat G, Padilla F, Svrcekova M, Chevalier Y, Pahr D, Peyrin F, Laugier P, Zysset P. Relationship between ultrasonic parameters and apparent trabecular bone elastic modulus: a numerical approach. J Biomech 2009; 42:2033-9. [PMID: 19646703 DOI: 10.1016/j.jbiomech.2009.06.008] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2009] [Revised: 06/04/2009] [Accepted: 06/05/2009] [Indexed: 11/19/2022]
Abstract
The physical principles underlying quantitative ultrasound (QUS) measurements in trabecular bone are not fully understood. The translation of QUS results into bone strength remains elusive. However, ultrasound being mechanical waves, it is likely to assess apparent bone elasticity. The aim of this study is to derive the sensitivity of QUS parameters to variations of apparent bone elasticity, a surrogate for strength. The geometry of 34 human trabecular bone samples cut in the great trochanter was reconstructed using 3-D synchrotron micro-computed tomography. Finite-difference time-domain simulations coupled to 3-D micro-structural models were performed in the three perpendicular directions for each sample and each direction. A voxel-based micro-finite element linear analysis was employed to compute the apparent Young's modulus (E) of each sample for each direction. For the antero-posterior direction, the predictive power of speed of sound and normalized broadband ultrasonic attenuation to assess E was equal to 0.9 and 0.87, respectively, which is better than what is obtained using bone density alone or coupled with micro-architectural parameters and of the same order of what can be achieved with the fabric tensor approach. When the direction of testing is parallel to the main trabecular orientation, the predictive power of QUS parameters decreases and the fabric tensor approach always gives the best results. This decrease can be explained by the presence of two longitudinal wave modes. Our results, which were obtained using two distinct simulation tools applied on the same set of samples, highlight the potential of QUS techniques to assess bone strength.
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Pakula M, Padilla F, Laugier P. 86 In Vitro Studies of Influence of Intrinsic Properties of the Pore-Fluid on the Ultrasonic Parameters in Cancellous Bones. J Clin Densitom 2009. [DOI: 10.1016/j.jocd.2008.07.095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Haïat G, Padilla F, Peyrin F, Laugier P. 79 Influence of Bone Mass and of Structural Anisotropy on the Fast and Slow Wave Propagation in Femoral Trabecular Bone. J Clin Densitom 2009. [DOI: 10.1016/j.jocd.2008.07.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mizuno K, Matsukawa M, Padilla F, Laugier P. 38 Ultrasonic Wave Propagation in Human Cancellous Bones. J Clin Densitom 2009. [DOI: 10.1016/j.jocd.2008.07.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Haïat G, Lhémery A, Renaud F, Padilla F, Laugier P, Naili S. Velocity dispersion in trabecular bone: influence of multiple scattering and of absorption. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2008; 124:4047-58. [PMID: 19206827 DOI: 10.1121/1.3003077] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Speed of sound measurements are widely used clinically to assess bone strength. Trabecular bone is an attenuating composite material in which negative values of velocity dispersion have been measured, this behavior remaining poorly explained physically. The aim of this work is to describe the ultrasonic propagation in trabecular bone modeled by infinite cylinders immersed in a saturating matrix, and to derive the physical determinants of velocity dispersion. A homogenization model accounting for the coupling of multiple scattering and absorption phenomena allows the computation of phase velocity and of dispersion while varying bone properties. The present model is adapted from the generalized self-consistent method developed in the work of Yang and Mal [(1994). "Multiple-scattering of elastic waves in a fiber-reinforced composite," J. Mech. Phys. Solids 42, 1945-1968]. It predicts negative values of velocity dispersion, in agreement with experimental results obtained in phantoms mimicking trabecular bone. In trabecular bone, mostly negative and also positive values of velocity dispersion are predicted by the model, which span within the range of values measured experimentally. Scattering effects are responsible for the negative values of dispersion, whereas the frequency dependence of the absorption coefficient in bone marrow and/or in the trabeculae results in an increase in dispersion, which may then become positive.
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Haiat G, Padilla F, Laugier P. Sensitivity of qus parameters to controlled variations of bone strength assessed with a cellular model. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2008; 55:1488-1496. [PMID: 18986938 DOI: 10.1109/tuffc.2008.824] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The physical principles underlying quantitative ultrasound (QUS) measurements are not fully understood yet. Therefore, the translation of QUS results into bone strength remains elusive. In the present study, we derive the sensitivity of broadband ultrasonic attenuation (BUA) and speed of sound (SOS) to variations of bone strength. For this purpose, a mechanical cellular model is combined to a multiple regression resulting from the analysis of finite-difference time domain (FDTD) simulations. Specifically, we investigate how QUS variables respond to a variation in strength of 10%, realized either by a change in material properties or a change in bone volume fraction (BV/TV). The results show that except when BV/TV is high, the variations of BUA in response to a variation in strength realized by a pure change of BV/TV exceeds the technique imprecision and thus can be detected. When the variation of strength is realized by changes of compressive or shear stiffness, the response in QUS properties is dominated by the variation in C(11), whereas changes in C(44), remaining below the precision error, cannot be detected. The interpretation of these data, however, is not straightforward due to sparse description of elastic properties at the tissue level. To overcome the limitation of the cellular model, more realistic computational models such as micro- finite element analysis have to be considered.
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Padilla F, Jenson F, Bousson V, Peyrin F, Laugier P. Relationships of trabecular bone structure with quantitative ultrasound parameters: in vitro study on human proximal femur using transmission and backscatter measurements. Bone 2008; 42:1193-202. [PMID: 18396124 DOI: 10.1016/j.bone.2007.10.024] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2007] [Revised: 09/28/2007] [Accepted: 10/23/2007] [Indexed: 10/22/2022]
Abstract
The present study was designed to assess the relationships between QUS parameters and bone density or microarchitecture on samples of human femoral trabecular bone. The normalized slope of the frequency-dependent attenuation (nBUA), the speed of sound (SOS) and the broadband ultrasound backscatter coefficient (BUB) were measured on 37 specimens of pure trabecular bones removed from upper parts of fresh human femurs. Bone mineral density (BMD) was assessed using a clinical scanner. Finally, 8 mm diameter cylindrical cores were extracted from the specimens and their microarchitecture was reconstructed after synchrotron radiation microtomography experiments (isotropic resolution of 10 microm). A large number of microarchitectural parameters were computed, describing morphology, connectivity and geometry of the specimens. BMD correlated with all the microarchitectural parameters and the number of significant correlations was found among the architectural parameters themselves. All QUS parameters were significantly correlated to BMD (R=0.83 for nBUA, R=0.81 for SOS and R=0.69 for BUB) and to microarchitectural parameters (R=-0.79 between nBUA and Tb.Sp, R=-0.81 between SOS and Tb.Sp, R=-0.65 between BUB and BS/BV). Using multivariate model, it was found that microstructural parameters adds 10%, 19%, and 4% to the respective BMD alone contribution for the three variables BUA, SOS and BUB. Moreover, the RMSE was reduced by up to 50% for SOS, by up to 21% for nBUA and up to 11% when adding structural variables to BMD in explaining QUS results. Given the sample, which is not osteoporosis-enriched, the added contribution is quite substantial. The variability of SOS was indeed completely explained by a multivariate model including BMD and independent structural parameters (R(2)=0.94). The inverse problem on the data presented here has been addressed using simple and multiple linear regressions. It was shown that the predictions (in terms of R(2) or RMSE) of microarchitectural parameters was not enhanced when combining 2 or 3 QUS in multiple linear regressions compared to the prediction obtained with one QUS parameter alone. The best model was found for the prediction of Tb.Th() from BUA (R(2)=0.58, RMSE=17 microm). Given the high values of RMSE, these linear models appear of limited clinical value, suggesting that appropriate models have to be derived in order to solve the inverse problem. In this regard, a very interesting multivariate model was found for nBUA and BUB with Tb.Th and Tb.N, in agreement with single scattering theories by random medium. However, the source of residual variability of nBUA and BUB (15% and 45% respectively) remained unexplained.
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Haïat G, Padilla F, Peyrin F, Laugier P. Fast wave ultrasonic propagation in trabecular bone: numerical study of the influence of porosity and structural anisotropy. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2008; 123:1694-705. [PMID: 18345857 DOI: 10.1121/1.2832611] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Our goal is to assess the potential of computational methods as an alternative to analytical models to predict the two longitudinal wave modes observed in cancellous bone and predicted by the Biot theory. A three-dimensional (3D) finite-difference time-domain method is coupled with 34 human femoral trabecular microstructures measured using microcomputed tomography. The main trabecular alignment (MTA) and the degree of anisotropy (DA) were assessed for all samples. DA values were comprised between 1.02 and 1.9. The influence of bone volume fraction (BV/TV) between 5% and 25% on the properties of the fast and slow waves was studied using a dedicated image processing algorithm to modify the initial 3D microstructures. A heuristic method was devised to determine when both wave modes are time separated. The simulations (performed in three perpendicular directions) predicted that both waves generally overlap in time for a direction of propagation perpendicular to the MTA. When these directions are parallel, both waves are separated in time for samples with high DA and BV/TV values. A relationship was found between the least bone volume fraction required for the observation of nonoverlapping waves and the degree of anisotropy: The higher the DA, the lower the least BV/TV.
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Barkmann R, Dencks S, Laugier P, Padilla F, Glüer CC, Heller M. Osteodensitometrie mit DXA und Quantitativer Ultraschall am Femur diskriminieren gleich gut zwischen Frauen mit und ohne osteoporotischen Schenkelhalsfrakturen. ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1073765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Vellando P, Fe J, Juncosa R, Padilla F. Improvements in mixing operations of water treatment plants by use of a stable finite element model. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2007; 79:625-40. [PMID: 17605331 DOI: 10.2175/106143006x136757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
This work shows improvements made in mixing operations at water treatment plants, as a result of the hydrodynamic analysis of the mixing processes carried out by the use of a Finite Element Model. The code, developed in the Civil Engineering Department of the University of La Coruña, Spain, solves the Navier-Stokes equations that rule viscous incompressible flow by using a Streamline Upwind/Petrov-Galerkin (SUPG) stabilization technique. The incorporation of the SUPG formulation leads to obtaining stable solutions for Reynolds numbers of a moderate order in connection with meshes that are not very refined. Some water treatment units present significant deficiencies in their design. The numerical evaluation of the flow avoids the high expenses of the trial-and-error processes involved in installing and removing the mixing mechanisms and those derived from the need to halt the water treatment processes. As a result, an optimum design of the treatment plant is obtained at a low cost.
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Vastel L, Masse C, Crozier E, Padilla F, Laugier P, Mitton D, Bardonnet R, Courpied JP. Effects of gamma irradiation on mechanical properties of defatted trabecular bone allografts assessed by speed-of-sound measurement. Cell Tissue Bank 2007; 8:205-10. [PMID: 17205382 DOI: 10.1007/s10561-006-9030-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2006] [Accepted: 10/19/2006] [Indexed: 10/23/2022]
Abstract
New sterilization methods for human bone allografts may lead to alterations in bone mechanical properties, which strongly influence short- and medium-term outcomes. In many sterilization procedures, bone allografts are subjected to gamma irradiation, usually with 25 KGy, after treatment and packaging. We used speed-of-sound (SOS) measurements to evaluate the effects of gamma irradiation on bone. All bone specimens were subjected to the same microbial inactivation procedure. They were then separated into three groups, of which one was treated and not irradiated and two were exposed to 10 and 25 KGy of gamma radiation, respectively. SOS was measured using high- and low-frequency ultrasound beams in each orthogonal direction. SOS and Young modulus were altered significantly in the three groups, compared to native untreated bone. Exposure to 10 or 25 KGy had no noticeable effect on the study variables. The impact of irradiation was small compared to the effects of physical or chemical defatting. Reducing the radiation dose used in everyday practice failed to improve graft mechanical properties in this study.
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Barkmann R, Laugier P, Moser U, Dencks S, Klausner M, Padilla F, Haiat G, Glüer CC. Erste in vivo Messungen der Ultraschalltransmission am menschlichen proximalen Femur. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2006-956216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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