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Aggarwal MM, Ahammed Z, Angelis ALS, Antonenko V, Arefiev V, Astakhov V, Avdeitchikov V, Awes TC, Baba PVKS, Badyal SK, Bathe S, Batiounia B, Baumann C, Bernier T, Bhalla KB, Bhatia VS, Blume C, Bucher D, Büsching H, Carlén L, Chattopadhyay S, Decowski MP, Delagrange H, Donni P, Majumdar MRD, El Chenawi K, Dubey AK, Enosawa K, Fokin S, Frolov V, Ganti MS, Garpman S, Gavrishchuk O, Geurts FJM, Ghosh TK, Glasow R, Guskov B, Gustafsson HA, Gutbrod HH, Hrivnacova I, Ippolitov M, Kalechofsky H, Kamermans R, Karadjev K, Karpio K, Kolb BW, Kosarev I, Koutcheryaev I, Kugler A, Kulinich P, Kurata M, Lebedev A, Löhner H, Luquin L, Mahapatra DP, Manko V, Martin M, Martínez G, Maximov A, Miake Y, Mishra GC, Mohanty B, Mora MJ, Morrison D, Mukhanova T, Mukhopadhyay DS, Naef H, Nandi BK, Nayak SK, Nayak TK, Nianine A, Nikitine V, Nikolaev S, Nilsson P, Nishimura S, Nomokonov P, Nystrand J, Oskarsson A, Otterlund I, Pavliouk S, Peitzmann T, Peressounko D, Petracek V, Phatak SC, Pinganaud W, Plasil F, Purschke ML, Rak J, Rammler M, Raniwala R, Raniwala S, Rao NK, Retiere F, Reygers K, Roland G, Rosselet L, Roufanov I, Roy C, Rubio JM, Sambyal SS, Santo R, Sato S, Schlagheck H, Schmidt HR, Schutz Y, Shabratova G, Shah TH, Sibiriak I, Siemiarczuk T, Silvermyr D, Sinha BC, Slavine N, Söderström K, Sood G, Sørensen SP, Stankus P, Stefanek G, Steinberg P, Stenlund E, Sumbera M, Svensson T, Tsvetkov A, Tykarski L, V D Pijll EC, V Eijndhoven N, V Nieuwenhuizen GJ, Vinogradov A, Viyogi YP, Vodopianov A, Vörös S, Wysłouch B, Young GR. Suppression of high-p{T} neutral pion production in central Pb+Pb collisions at sqrt[S{NN}]=17.3 GeV relative to p+C and p+Pb collisions. Phys Rev Lett 2008; 100:242301. [PMID: 18643578 DOI: 10.1103/physrevlett.100.242301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2007] [Revised: 05/12/2008] [Indexed: 05/26/2023]
Abstract
Neutral pion transverse momentum spectra were measured in p+C and p+Pb collisions at sqrt[S{NN}]=17.4 GeV at midrapidity (2.3 less than or approximately equal eta{lab} less than or approximately equal 3.0) over the range 0.7 less than or approximately equal p{T} less than or approximately equal 3.5 GeV/c. The spectra are compared to pi{0} spectra measured in Pb+Pb collisions at sqrt[S{NN}]=17.3 GeV in the same experiment. For a wide range of Pb+Pb centralities (N{part} less than or approximately equal 300), the yield of pi{0}'s with p{T} greater than or approximately equal 2 GeV/c is larger than or consistent with the p+C or p+Pb yields scaled with the number of nucleon-nucleon collisions (N{coll}), while for central Pb+Pb collisions with N{part}greater than or approximately equal 350, the pi{0} yield is suppressed.
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Aggarwal MM, Ahammed Z, Angelis ALS, Antonenko V, Arefiev V, Astakhov V, Avdeitchikov V, Awes TC, Baba PVKS, Badyal SK, Bathe S, Batiounia B, Bernier T, Bhalla KB, Bhatia VS, Blume C, Bucher D, Büsching H, Carlén L, Chattopadhyay S, Decowski MP, Delagrange H, Donni P, Dutta Majumdar MR, el Chenawi K, Dubey AK, Enosawa K, Fokin S, Frolov V, Ganti MS, Garpman S, Gavrishchuk O, Geurts FJM, Ghosh TK, Glasow R, Guskov B, Gustafsson HA, Gutbrod HH, Hrivnacova I, Ippolitov M, Kalechofsky H, Karadjev K, Karpio K, Kolb BW, Kosarev I, Koutcheryaev I, Kugler A, Kulinich P, Kurata M, Lebedev A, Löhner H, Luquin L, Mahapatra DP, Manko V, Martin M, Martínez G, Maximov A, Miake Y, Mishra GC, Mohanty B, Mora MJ, Morrison D, Moukhanova T, Mukhopadhyay DS, Naef H, Nandi BK, Nayak SK, Nayak TK, Nianine A, Nikitine V, Nikolaev S, Nilsson P, Nishimura S, Nomokonov P, Nystrand J, Oskarsson A, Otterlund I, Peitzmann T, Peressounko D, Petracek V, Phatak SC, Pinganaud W, Plasil F, Purschke ML, Rak J, Raniwala R, Raniwala S, Rao NK, Retiere F, Reygers K, Roland G, Rosselet L, Roufanov I, Roy C, Rubio JM, Sambyal SS, Santo R, Sato S, Schlagheck H, Schmidt HR, Schutz Y, Shabratova G, Shah TH, Sibiriak I, Siemiarczuk T, Silvermyr D, Sinha BC, Slavine N, Söderström K, Sood G, Sørensen SP, Stankus P, Stefanek G, Steinberg P, Stenlund E, Sumbera M, Svensson T, Tsvetkov A, Tykarski L, v d Pijll EC, von Eijndhoven N, von Nieuwenhuizen GJ, Vinogradov A, Viyogi YP, Vodopianov A, Vörös S, Wysłouch B, Young GR. Interferometry of direct photons in central 208Pb + 208Pb collisions at 158A GeV. Phys Rev Lett 2004; 93:022301. [PMID: 15323905 DOI: 10.1103/physrevlett.93.022301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2003] [Indexed: 05/24/2023]
Abstract
Two-particle correlations of direct photons were measured in central 208Pb+208Pb collisions at 158A GeV. The invariant interferometric radii were extracted for 100<K(T)<300 MeV/c and compared to radii extracted from charged pion correlations. The yield of soft direct photons, K(T)<300 MeV/c, was extracted from the correlation strength and compared to theoretical calculations.
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Adler C, Ahammed Z, Allgower C, Amonett J, Anderson BD, Anderson M, Averichev GS, Balewski J, Barannikova O, Barnby LS, Baudot J, Bekele S, Belaga VV, Bellwied R, Berger J, Bichsel H, Bland LC, Blyth CO, Bonner BE, Bossingham R, Boucham A, Brandin A, Caines H, Calderón De La Barca Sánchez M, Cardenas A, Carroll J, Castillo J, Castro M, Cebra D, Chattopadhyay S, Chen ML, Chen Y, Chernenko SP, Cherney M, Chikanian A, Choi B, Christie W, Coffin JP, Conin L, Cormier TM, Cramer JG, Crawford HJ, DeMello M, Deng WS, Derevschikov AA, Didenko L, Draper JE, Dunin VB, Dunlop JC, Eckardt V, Efimov LG, Emelianov V, Engelage J, Eppley G, Erazmus B, Fachini P, Finch E, Fisyak Y, Flierl D, Foley KJ, Fu J, Gagunashvili N, Gans J, Gaudichet L, Germain M, Geurts F, Ghazikhanian V, Grabski J, Grachov O, Greiner D, Grigoriev V, Guedon M, Gushin E, Hallman TJ, Hardtke D, Harris JW, Heffner M, Heppelmann S, Herston T, Hippolyte B, Hirsch A, Hjort E, Hoffmann GW, Horsley M, Huang HZ, Humanic TJ, Hümmler H, Igo G, Ishihara A, Ivanshin YI, Jacobs P, Jacobs WW, Janik M, Johnson I, Jones PG, Judd E, Kaneta M, Kaplan M, Keane D, Kisiel A, Klay J, Klein SR, Klyachko A, Konstantinov AS, Kotchenda L, Kovalenko AD, Kramer M, Kravtsov P, Krueger K, Kuhn C, Kulikov AI, Kunde GJ, Kunz CL, Kutuev RK, Kuznetsov AA, Lakehal-Ayat L, Lamas-Valverde J, Lamont MA, Landgraf JM, Lange S, Lansdell CP, Lasiuk B, Laue F, Lebedev A, LeCompte T, Lednický R, Leontiev VM, Leszczynski P, LeVine MJ, Li Q, Li Q, Lindenbaum SJ, Lisa MA, Ljubicic T, Llope WJ, LoCurto G, Long H, Longacre RS, Lopez-Noriega M, Love WA, Lynn D, Majka R, Maliszewski A, Margetis S, Martin L, Marx J, Matis HS, Matulenko YA, McShane TS, Meissner F, Melnick Y, Meschanin A, Messer M, Miller ML, Milosevich Z, Minaev NG, Mitchell J, Moiseenko VA, Moltz D, Moore CF, Morozov V, de Moura MM, Munhoz MG, Mutchler GS, Nelson JM, Nevski P, Nikitin VA, Nogach LV, Norman B, Nurushev SB, Odyniec G, Ogawa A, Okorokov V, Oldenburg M, Olson D, Paic G, Pandey SU, Panebratsev Y, Panitkin SY, Pavlinov AI, Pawlak T, Perevoztchikov V, Peryt W, Petrov VA, Pinganaud W, Platner E, Pluta J, Porile N, Porter J, Poskanzer AM, Potrebenikova E, Prindle D, Pruneau C, Radomski S, Rai G, Ravel O, Ray RL, Razin SV, Reichhold D, Reid JG, Retiere F, Ridiger A, Ritter HG, Roberts JB, Rogachevski OV, Romero JL, Roy C, Russ D, Rykov V, Sakrejda I, Sandweiss J, Saulys AC, Savin I, Schambach J, Scharenberg RP, Schweda K, Schmitz N, Schroeder LS, Schüttauf A, Seger J, Seliverstov D, Seyboth P, Shahaliev E, Shestermanov KE, Shimanskii SS, Shvetcov VS, Skoro G, Smirnov N, Snellings R, Sowinski J, Spinka HM, Srivastava B, Stephenson EJ, Stock R, Stolpovsky A, Strikhanov M, Stringfellow B, Stroebele H, Struck C, Suaide AA, Sugarbaker E, Suire C, Sumbera M, Symons TJ, Szanto De Toledo A, Szarwas P, Takahashi J, Tang AH, Thomas JH, Tikhomirov V, Trainor TA, Trentalange S, Tokarev M, Tonjes MB, Trofimov V, Tsai O, Turner K, Ullrich T, Underwood DG, Van Buren G, VanderMolen AM, Vanyashin A, Vasilevski IM, Vasiliev AN, Vigdor SE, Voloshin SA, Wang F, Ward H, Watson JW, Wells R, Wenaus T, Westfall GD, Whitten C, Wieman H, Willson R, Wissink SW, Witt R, Xu N, Xu Z, Yakutin AE, Yamamoto E, Yang J, Yepes P, Yokosawa A, Yurevich VI, Zanevski YV, Zborovský I, Zhang WM, Zoulkarneev R, Zubarev AN. Multiplicity distribution and spectra of negatively charged hadrons in Au+Au collisions at square root of (sNN) = 130 GeV. Phys Rev Lett 2001; 87:112303. [PMID: 11531517 DOI: 10.1103/physrevlett.87.112303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2001] [Indexed: 05/23/2023]
Abstract
The minimum-bias multiplicity distribution and the transverse momentum and pseudorapidity distributions for central collisions have been measured for negative hadrons ( h(-)) in Au+Au interactions at square root of ([s(NN)]) = 130 GeV. The multiplicity density at midrapidity for the 5% most central interactions is dN(h(-))/d(eta)/(eta = 0) = 280+/-1(stat)+/-20(syst), an increase per participant of 38% relative to pp collisions at the same energy. The mean transverse momentum is 0.508+/-0.012 GeV/c and is larger than in central Pb+Pb collisions at lower energies. The scaling of the h(-) yield per participant is a strong function of p( perpendicular). The pseudorapidity distribution is almost constant within /eta/<1.
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Affiliation(s)
- C Adler
- University of Frankfurt, Frankfurt, Germany
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Adler C, Ahammed Z, Allgower C, Amonett J, Anderson BD, Anderson M, Averichev GS, Balewski J, Barannikova O, Barnby LS, Baudot J, Bekele S, Belaga VV, Bellwied R, Berger J, Bichsel H, Bland LC, Blyth CO, Bonner BE, Bossingham R, Boucham A, Brandin A, Cadman RV, Caines H, Calderón De La Barca Sánchez M, Cardenas A, Carroll J, Castillo J, Castro M, Cebra D, Chattopadhyay S, Chen ML, Chen Y, Chernenko SP, Cherney M, Chikanian A, Choi B, Christie W, Coffin JP, Conin L, Cormier TM, Cramer JG, Crawford HJ, DeMello M, Deng WS, Derevschikov AA, Didenko L, Draper JE, Dunin VB, Dunlop JC, Eckardt V, Efimov LG, Emelianov V, Engelage J, Eppley G, Erazmus B, Fachini P, Faine V, Finch E, Fisyak Y, Flierl D, Foley KJ, Fu J, Gagunashvili N, Gans J, Gaudichet L, Germain M, Geurts F, Ghazikhanian V, Grabski J, Grachov O, Greiner D, Grigoriev V, Guedon M, Gushin E, Hallman TJ, Hardtke D, Harris JW, Heffner M, Heppelmann S, Herston T, Hippolyte B, Hirsch A, Hjort E, Hoffmann GW, Horsley M, Huang HZ, Humanic TJ, Hümmler H, Igo G, Ishihara A, Ivanshin YI, Jacobs P, Jacobs WW, Janik M, Johnson I, Jones PG, Judd E, Kaneta M, Kaplan M, Keane D, Kisiel A, Klay J, Klein SR, Klyachko A, Konstantinov AS, Kotchenda L, Kovalenko AD, Kramer M, Kravtsov P, Krueger K, Kuhn C, Kulikov AI, Kunde GJ, Kunz CL, Kutuev RK, Kuznetsov AA, Lakehal-Ayat L, Lamas-Valverde J, Lamont MA, Landgraf JM, Lange S, Lansdell CP, Lasiuk B, Laue F, Lebedev A, LeCompte T, Lednický R, Leontiev VM, LeVine MJ, Li Q, Li Q, Lindenbaum SJ, Lisa MA, Ljubicic T, Llope WJ, LoCurto G, Long H, Longacre RS, Lopez-Noriega M, Love WA, Lynn D, Majka R, Margetis S, Martin L, Marx J, Matis HS, Matulenko YA, McShane TS, Meissner F, Melnick Y, Meschanin A, Messer M, Miller ML, Milosevich Z, Minaev NG, Mitchell J, Moiseenko VA, Moltz D, Moore CF, Morozov V, de Moura MM, Munhoz MG, Mutchler GS, Nelson JM, Nevski P, Nikitin VA, Nogach LV, Norman B, Nurushev SB, Odyniec G, Ogawa A, Okorokov V, Oldenburg M, Olson D, Paic G, Pandey SU, Panebratsev Y, Panitkin SY, Pavlinov AI, Pawlak T, Perevoztchikov V, Peryt W, Petrov VA, Pinganaud W, Platner E, Pluta J, Porile N, Porter J, Poskanzer AM, Potrebenikova E, Prindle D, Pruneau C, Radomski S, Rai G, Ravel O, Ray RL, Razin SV, Reichhold D, Reid JG, Retiere F, Ridiger A, Ritter HG, Roberts JB, Rogachevski OV, Romero JL, Roy C, Russ D, Rykov V, Sakrejda I, Sandweiss J, Saulys AC, Savin I, Schambach J, Scharenberg RP, Schweda K, Schmitz N, Schroeder LS, Schüttauf A, Seger J, Seliverstov D, Seyboth P, Shahaliev E, Shestermanov KE, Shimanskii SS, Shvetcov VS, Skoro G, Smirnov N, Snellings R, Sowinski J, Spinka HM, Srivastava B, Stephenson EJ, Stock R, Stolpovsky A, Strikhanov M, Stringfellow B, Stroebele H, Struck C, Suaide AA, Sugarbaker E, Suire C, Sumbera M, Symons TJ, Szanto De Toledo A, Szarwas P, Takahashi J, Tang AH, Thomas JH, Tikhomirov V, Trainor TA, Trentalange S, Tokarev M, Tonjes MB, Trofimov V, Tsai O, Turner K, Ullrich T, Underwood DG, Van Buren G, VanderMolen AM, Vanyashin A, Vasilevski IM, Vasiliev AN, Vigdor SE, Voloshin SA, Wang F, Ward H, Watson JW, Wells R, Wenaus T, Westfall GD, Whitten C, Wieman H, Willson R, Wissink SW, Witt R, Xu N, Xu Z, Yakutin AE, Yamamoto E, Yang J, Yepes P, Yokosawa A, Yurevich VI, Zanevski YV, Zborovský I, Zhang WM, Zoulkarneev R, Zubarev AN. Pion Interferometry of square root of (s(NN)) =130 GeV Au + Au collisions at RHIC. Phys Rev Lett 2001; 87:082301. [PMID: 11497937 DOI: 10.1103/physrevlett.87.082301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2001] [Indexed: 05/23/2023]
Abstract
Two-pion correlation functions in Au+Au collisions at square root of [s(NN)] = 130 GeV have been measured by the STAR (solenoidal tracker at RHIC) detector. The source size extracted by fitting the correlations grows with event multiplicity and decreases with transverse momentum. Anomalously large sizes or emission durations, which have been suggested as signals of quark-gluon plasma formation and rehadronization, are not observed. The Hanbury Brown-Twiss parameters display a weak energy dependence over a broad range in square root of [s(NN)].
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Affiliation(s)
- C Adler
- University of Frankfurt, Frankfurt, Germany
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Adler C, Ahammed Z, Allgower C, Anderson M, Averichev GS, Balewski J, Barannikova O, Barnby LS, Baudot J, Bekele S, Belaga VV, Bellwied R, Berger J, Bichsel H, Bland LC, Blyth CO, Bonner BE, Bossingham R, Boucham A, Brandin A, Caines H, de la Barca Sánchez MC, Cardenas A, Carroll J, Castillo J, Castro M, Cebra D, Chattopadhyay S, Chen ML, Chen Y, Chernenko SP, Cherney M, Chikanian A, Choi B, Christie W, Coffin JP, Conin L, Cormier TM, Cramer JG, Crawford HJ, DeMello M, Deng WS, Derevschikov AA, Didenko L, Draper JE, Dunin VB, Dunlop JC, Eckardt V, Efimov LG, Emelianov V, Engelage J, Eppley G, Erazmus B, Fachini P, Ferguson MI, Finch E, Fisyak Y, Flierl D, Foley KJ, Gagunashvili N, Gans J, Germain M, Geurts F, Ghazikhanian V, Grabski J, Grachov O, Greiner D, Grigoriev V, Gushin E, Hallman TJ, Hardtke D, Harris JW, Heffner M, Heppelmann S, Herston T, Hippolyte B, Hirsch A, Hjort E, Hoffmann GW, Horsley M, Huang HZ, Humanic TJ, Hümmler H, Igo GJ, Ishihara A, Ivanshin YI, Jacobs P, Jacobs WW, Janik M, Johnson I, Jones PG, Judd E, Kaneta M, Kaplan M, Keane D, Khodinov A, Kisiel A, Klay J, Klein SR, Klyachko A, Konstantinov AS, Kotchenda L, Kovalenko AD, Kramer M, Kravtsov P, Krueger K, Kuhn C, Kulikov AI, Kunde GJ, Kunz CL, Kutuev RK, Kuznetsov AA, Lamas-Valverde J, Lamont MA, Landgraf JM, Lange S, Lansdell CP, Lasiuk B, Laue F, Lebedev A, LeCompte T, Leontiev VM, Leszczynski P, LeVine MJ, Li Q, Li Q, Lindenbaum SJ, Lisa MA, Ljubicic T, Llope WJ, LoCurto G, Long H, Longacre RS, Lopez-Noriega M, Love WA, Lynn D, Madansky L, Majka R, Maliszewski A, Margetis S, Martin L, Marx J, Matis HS, Matulenko YA, McShane TS, Melnick Y, Meschanin A, Milosevich Z, Minaev NG, Mitchell J, Moiseenko VA, Moltz D, Moore CF, Morozov V, de Moura MM, Munhoz MG, Mutchler GS, Nelson JM, Nevski P, Nikitin VA, Nogach LV, Norman B, Nurushev SB, Nystrand J, Odyniec G, Ogawa A, Ogilvie CA, Oldenburg M, Olson D, Paic G, Pandey SU, Panebratsev Y, Panitkin SY, Pavlinov AI, Pawlak T, Perevoztchikov V, Peryt W, Petrov VA, Pinganaud W, Platner E, Pluta J, Porile N, Porter J, Poskanzer AM, Potrebenikova E, Prindle D, Pruneau C, Radomski S, Rai G, Ravel O, Ray RL, Razin SV, Reichhold D, Reid J, Retiere F, Ridiger A, Ritter HG, Roberts JB, Rogachevski OV, Roy C, Russ D, Rykov V, Sakrejda I, Sandweiss J, Saulys AC, Savin I, Schambach J, Scharenberg RP, Schmitz N, Schroeder LS, Schüttauf A, Seger J, Seliverstov D, Seyboth P, Shestermanov KE, Shimanskii SS, Shvetcov VS, Skoro G, Smirnov N, Snellings R, Sowinski J, Spinka HM, Srivastava B, Stephenson EJ, Stock R, Stolpovsky A, Strikhanov M, Stringfellow B, Stroebele H, Struck C, Suaide AA, Sugarbaker E, Suire C, Symons TJ, Szanto de Toledo A, Szarwas P, Takahashi J, Tang AH, Thomas JH, Tikhomirov V, Trainor T, Trentalange S, Tokarev M, Tonjes MB, Trofimov V, Tsai O, Turner K, Ullrich T, Underwood DG, Van Buren G, VanderMolen AM, Vanyashin A, Vasilevski IM, Vasiliev AN, Vigdor SE, Voloshin SA, Wang F, Ward H, Wells R, Wenaus T, Westfall GD, Whitten C, Wieman H, Willson R, Wissink SW, Witt R, Xu N, Xu Z, Yakutin AE, Yamamoto E, Yang J, Yepes P, Yokosawa A, Yurevich VI, Zanevski YV, Zhang J, Zhang WM, Zoulkarneev R, Zubarev AN. Midrapidity antiproton-to-proton ratio from Au+Au collisions at sqrt [s(NN)]=130 GeV. Phys Rev Lett 2001; 86:4778-4782. [PMID: 11384346 DOI: 10.1103/physrevlett.86.4778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2000] [Indexed: 05/23/2023]
Abstract
We report results on the ratio of midrapidity antiproton-to-proton yields in Au+Au collisions at sqrt[s(NN)] = 130 GeV per nucleon pair as measured by the STAR experiment at RHIC. Within the rapidity and transverse momentum range of /y/<0.5 and 0.4<p(t)<1.0 GeV/c, the ratio is essentially independent of either transverse momentum or rapidity, with an average of 0.65+/-0.01((stat))+/-0.07((syst)) for minimum bias collisions. Within errors, no strong centrality dependence is observed. The results indicate that at this RHIC energy, although the p-p pair production becomes important at midrapidity, a significant excess of baryons over antibaryons is still present.
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Affiliation(s)
- C Adler
- University of Frankfurt, Frankfurt, Germany
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Ackermann KH, Adams N, Adler C, Ahammed Z, Ahmad S, Allgower C, Amsbaugh J, Anderson M, Anderssen E, Arnesen H, Arnold L, Averichev GS, Baldwin A, Balewski J, Barannikova O, Barnby LS, Baudot J, Beddo M, Bekele S, Belaga VV, Bellwied R, Bennett S, Bercovitz J, Berger J, Betts W, Bichsel H, Bieser F, Bland LC, Bloomer M, Blyth CO, Boehm J, Bonner BE, Bonnet D, Bossingham R, Botlo M, Boucham A, Bouillo N, Bouvier S, Bradley K, Brady FP, Braithwaite ES, Braithwaite W, Brandin A, Brown RL, Brugalette G, Byrd C, Caines H, Calderón de la Barca Sánchez M, Cardenas A, Carr L, Carroll J, Castillo J, Caylor B, Cebra D, Chatopadhyay S, Chen ML, Chen W, Chen Y, Chernenko SP, Cherney M, Chikanian A, Choi B, Chrin J, Christie W, Coffin JP, Conin L, Consiglio C, Cormier TM, Cramer JG, Crawford HJ, Danilov VI, Dayton D, DeMello M, Deng WS, Derevschikov AA, Dialinas M, Diaz H, DeYoung PA, Didenko L, Dimassimo D, Dioguardi J, Dominik W, Drancourt C, Draper JE, Dunin VB, Dunlop JC, Eckardt V, Edwards WR, Efimov LG, Eggert T, Emelianov V, Engelage J, Eppley G, Erazmus B, Etkin A, Fachini P, Feliciano C, Ferenc D, Ferguson MI, Fessler H, Finch E, Fine V, Fisyak Y, Flierl D, Flores I, Foley KJ, Fritz D, Gagunashvili N, Gans J, Gazdzicki M, Germain M, Geurts F, Ghazikhanian V, Gojak C, Grabski J, Grachov O, Grau M, Greiner D, Greiner L, Grigoriev V, Grosnick D, Gross J, Guilloux G, Gushin E, Hall J, Hallman TJ, Hardtke D, Harper G, Harris JW, He P, Heffner M, Heppelmann S, Herston T, Hill D, Hippolyte B, Hirsch A, Hjort E, Hoffmann GW, Horsley M, Howe M, Huang HZ, Humanic TJ, Hümmler H, Hunt W, Hunter J, Igo GJ, Ishihara A, Ivanshin YI, Jacobs P, Jacobs WW, Jacobson S, Jared R, Jensen P, Johnson I, Jones PG, Judd E, Kaneta M, Kaplan M, Keane D, Kenney VP, Khodinov A, Klay J, Klein SR, Klyachko A, Koehler G, Konstantinov AS, Kormilitsyne V, Kotchenda L, Kotov I, Kovalenko AD, Kramer M, Kravtsov P, Krueger K, Krupien T, Kuczewski P, Kuhn C, Kunde GJ, Kunz CL, Kutuev RK, Kuznetsov AA, Lakehal-Ayat L, Lamas-Valverde J, Lamont MA, Landgraf JM, Lange S, Lansdell CP, Lasiuk B, Laue F, Lebedev A, LeCompte T, Leonhardt WJ, Leontiev VM, Leszczynski P, LeVine MJ, Li Q, Li Q, Li Z, Liaw CJ, Lin J, Lindenbaum SJ, Lindenstruth V, Lindstrom PJ, Lisa MA, Liu H, Ljubicic T, Llope WJ, LoCurto G, Long H, Longacre RS, Lopez-Noriega M, Lopiano D, Love WA, Lutz JR, Lynn D, Madansky L, Maier R, Majka R, Maliszewski A, Margetis S, Marks K, Marstaller R, Martin L, Marx J, Matis HS, Matulenko YA, Matyushevski EA, McParland C, McShane TS, Meier J, Melnick Y, Meschanin A, Middlekamp P, Mikhalin N, Miller B, Milosevich Z, Minaev NG, Minor B, Mitchell J, Mogavero E, Moiseenko VA, Moltz D, Moore CF, Morozov V, Morse R, de Moura MM, Munhoz MG, Mutchler GS, Nelson JM, Nevski P, Ngo T, Nguyen M, Nguyen T, Nikitin VA, Nogach LV, Noggle T, Norman B, Nurushev SB, Nussbaum T, Nystrand J, Odyniec G, Ogawa A, Ogilvie CA, Olchanski K, Oldenburg M, Olson D, Ososkov GA, Ott G, Padrazo D, Paic G, Pandey SU, Panebratsev Y, Panitkin SY, Pavlinov AI, Pawlak T, Pentia M, Perevotchikov V, Peryt W, Petrov VA, Pinganaud W, Pirogov S, Platner E, Pluta J, Polk I, Porile N, Porter J, Poskanzer AM, Potrebenikova E, Prindle D, Pruneau C, Puskar-Pasewicz J, Rai G, Rasson J, Ravel O, Ray RL, Razin SV, Reichhold D, Reid J, Renfordt RE, Retiere F, Ridiger A, Riso J, Ritter HG, Roberts JB, Roehrich D, Rogachevski OV, Romero JL, Roy C, Russ D, Rykov V, Sakrejda I, Sanchez R, Sandler Z, Sandweiss J, Sappenfield P, Saulys AC, Savin I, Schambach J, Scharenberg RP, Scheblien J, Scheetz R, Schlueter R, Schmitz N, Schroeder LS, Schulz M, Schüttauf A, Sedlmeir J, Seger J, Seliverstov D, Seyboth J, Seyboth P, Seymour R, Shakaliev EI, Shestermanov KE, Shi Y, Shimanskii SS, Shuman D, Shvetcov VS, Skoro G, Smirnov N, Smykov LP, Snellings R, Solberg K, Sowinski J, Spinka HM, Srivastava B, Stephenson EJ, Stock R, Stolpovsky A, Stone N, Stone R, Strikhanov M, Stringfellow B, Stroebele H, Struck C, Suaide AA, Sugarbaker E, Suire C, Symons TJ, Takahashi J, Tang AH, Tarchini A, Tarzian J, Thomas JH, Tikhomirov V, Szanto De Toledo A, Tonse S, Trainor T, Trentalange S, Tokarev M, Tonjes MB, Trofimov V, Tsai O, Turner K, Ullrich T, Underwood DG, Vakula I, Van Buren G, VanderMolen AM, Vanyashin A, Vasilevski IM, Vasiliev AN, Vigdor SE, Visser G, Voloshin SA, Vu C, Wang F, Ward H, Weerasundara D, Weidenbach R, Wells R, Wells R, Wenaus T, Westfall GD, Whitfield JP, Whitten C, Wieman H, Willson R, Wilson K, Wirth J, Wisdom J, Wissink SW, Witt R, Wolf J, Wood L, Xu N, Xu Z, Yakutin AE, Yamamoto E, Yang J, Yepes P, Yokosawa A, Yurevich VI, Zanevski YV, Zhang J, Zhang WM, Zhu J, Zimmerman D, Zoulkarneev R, Zubarev AN. Elliptic flow in Au+Au collisions at square root(S)NN = 130 GeV. Phys Rev Lett 2001; 86:402-407. [PMID: 11177841 DOI: 10.1103/physrevlett.86.402] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2000] [Indexed: 05/23/2023]
Abstract
Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic flow of charged particles at midrapidity in Au+Au collisions at square root(S)NN = 130 GeV using the STAR Time Projection Chamber at the Relativistic Heavy Ion Collider. The elliptic flow signal, v2, averaged over transverse momentum, reaches values of about 6% for relatively peripheral collisions and decreases for the more central collisions. This can be interpreted as the observation of a higher degree of thermalization than at lower collision energies. Pseudorapidity and transverse momentum dependence of elliptic flow are also presented.
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Nikolaev S, Nilsson P, Nishimura S, Nomokonov P, Nystrand J, Obenshain FE, Oskarsson A, Otterlund I, Pachr M, Pavliouk S, Peitzmann T, Petracek V, Pinganaud W, Plasil F, Poblotzki U, Purschke ML, Rak J, Raniwala R, Raniwala S, Ramamurthy VS, Rao NK, Retiere F, Reygers K, Roland G, Rosselet L, Roufanov I. Observation of direct photons in central 158A GeV (208)P(208)b+Pb collisions. Phys Rev Lett 2000; 85:3595-3599. [PMID: 11030959 DOI: 10.1103/physrevlett.85.3595] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2000] [Indexed: 05/23/2023]
Abstract
A measurement of direct photon production in 208Pb+208Pb collisions at 158A GeV has been carried out in the CERN WA98 experiment. The invariant yield of direct photons in central collisions is extracted as a function of transverse momentum in the interval 0.5<p(T)<4 GeV/c. A significant direct photon signal, compared to statistical and systematical errors, is seen at p(T)>1.5 GeV/c. The result constitutes the first observation of direct photons in ultrarelativistic heavy-ion collisions. It could be significant for diagnosis of quark-gluon-plasma formation.
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Affiliation(s)
- S Nikolaev
- University of Panjab, Chandigarh 160014, India
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Aggarwal MM, Agnihotri A, Ahammed Z, Angelis AL, Antonenko V, Arefiev V, Astakhov V, Avdeitchikov V, Awes TC, Baba PV, Badyal SK, Barlag C, Bathe S, Batiounia B, Bernier T, Bhalla KB, Bhatia VS, Blume C, Bock R, Bohne EM, Böröcz Z, Bucher D, Buijs A, Büsching H, Carlen L, Chalyshev V, Chattopadhyay S, Cherbatchev R, Chujo T, Claussen A, Das AC, Decowski MP, Delagrange H, Djordjadze V, Donni P, Doubovik I, Dutt S, Dutta Majumdar MR, El Chenawi K, Eliseev S, Enosawa K, Foka P, Fokin S, Ganti MS, Garpman S, Gavrishchuk O, Geurts FJ, Ghosh TK, Glasow R, Gupta SK, Guskov B, Gustafsson HA, Gutbrod HH, Higuchi R, Hrivnacova I, Ippolitov M, Kalechofsky H, Kamermans R, Kampert KH, Karadjev K, Karpio K, Kato S, Kees S, Klein-Bösing C, Knoche S, Kolb BW, Kosarev I, Koutcheryaev I, Krümpel T, Kugler A, Kulinich P, Kurata M, Kurita K, Kuzmin N, Langbein I, Lebedev A, Lee YY, Löhner H, Luquin L, Mahapatra DP, Manko V, Martin M, Martínez G, Maximov A, Mgebrichvili G, Miake Y, Mir MF, Mishra GC, Miyamoto Y, Mohanty B, Mora MJ, Morrison D, Mukhopadhyay DS, Naef H, Nandi BK, Nayak SK, Nayak TK, Neumaier S, Nianine A, Nikitine V, Nikolaev S, Nilsson P, Nishimura S, Nomokonov P, Nystrand J, Obenshain FE, Oskarsson A, Otterlund I, Pachr M, Pavliouk S, Peitzmann T, Petracek V, Pinganaud W, Plasil F, von Poblotzki U, Purschke ML, Rak J, Raniwala R, Raniwala S, Ramamurthy VS, Rao NK, Retiere F, Reygers K, Roland G, Rosselet L, Roufanov I, Roy C, Rubio JM, Sako H, Sambyal SS, Santo R, Sato S, Schlagheck H, Schmidt HR, Schutz Y, Shabratova G, Shah TH, Sibiriak I, Siemiarczuk T, Silvermyr D, Sinha BC, Slavine N, Söderström K, Solomey N, Sørensen SP, Stankus P, Stefanek G, Steinberg P, Stenlund E, Stüken D, Sumbera M, Svensson T, Trivedi MD, Tsvetkov A, Tykarski L, Urbahn J, Pijll EC, Eijndhoven N, Nieuwenhuizen GJ, Vinogradov A, Viyogi YP, Vodopianov A, Vörös S, Wysłouch B, Yagi K, Yokota Y, Young GR. Three-pion interferometry results from central Pb+Pb collisions at 158A GeV/c. Phys Rev Lett 2000; 85:2895-2899. [PMID: 11005962 DOI: 10.1103/physrevlett.85.2895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2000] [Indexed: 05/23/2023]
Abstract
Three-particle correlations have been measured for identified pi(-) from central 158A GeV Pb+Pb collisions by the WA98 experiment at CERN. A substantial contribution of the genuine three-body correlation has been found as expected for a mainly chaotic and symmetric source.
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