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Airapetian A, Akopov N, Akopov Z, Aschenauer EC, Augustyniak W, Avetissian A, Avetisyan E, Bacchetta A, Ball B, Bianchi N, Blok HP, Böttcher H, Bonomo C, Borissov A, Bryzgalov V, Burns J, Capiluppi M, Capitani GP, Cisbani E, Ciullo G, Contalbrigo M, Dalpiaz PF, Deconinck W, De Leo R, De Nardo L, De Sanctis E, Diefenthaler M, Di Nezza P, Dreschler J, Düren M, Ehrenfried M, Elbakian G, Ellinghaus F, Elschenbroich U, Fabbri R, Fantoni A, Felawka L, Frullani S, Gabbert D, Gapienko G, Gapienko V, Garibaldi F, Gharibyan V, Giordano F, Gliske S, Hadjidakis C, Hartig M, Hasch D, Hill G, Hillenbrand A, Hoek M, Holler Y, Hristova I, Imazu Y, Ivanilov A, Jackson HE, Jo HS, Joosten S, Kaiser R, Keri T, Kinney E, Kisselev A, Korotkov V, Kozlov V, Kravchenko P, Lagamba L, Lamb R, Lapikás L, Lehmann I, Lenisa P, Linden-Levy LA, López Ruiz A, Lorenzon W, Lu XG, Lu XR, Ma BQ, Mahon D, Makins NCR, Manaenkov SI, Manfré L, Mao Y, Marianski B, Martinez de la Ossa A, Marukyan H, Miller CA, Miyachi Y, Movsisyan A, Murray M, Mussgiller A, Nappi E, Naryshkin Y, Nass A, Negodaev M, Nowak WD, Pappalardo LL, Perez-Benito R, Reimer PE, Reolon AR, Riedl C, Rith K, Rosner G, Rostomyan A, Rubin J, Ryckbosch D, Salomatin Y, Sanftl F, Schäfer A, Schnell G, Schüler KP, Seitz B, Shibata TA, Shutov V, Stancari M, Statera M, Steijger JJM, Stenzel H, Stewart J, Stinzing F, Taroian S, Terkulov A, Trzcinski A, Tytgat M, Vandenbroucke A, van der Nat PB, Van Haarlem Y, Van Hulse C, Varanda M, Veretennikov D, Vikhrov V, Vilardi I, Vogel C, Wang S, Yaschenko S, Ye H, Ye Z, Yen S, Yu W, Zeiler D, Zihlmann B, Zupranski P. Observation of the naive-T-odd Sivers effect in deep-inelastic scattering. Phys Rev Lett 2009; 103:152002. [PMID: 19905623 DOI: 10.1103/physrevlett.103.152002] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2009] [Indexed: 05/28/2023]
Abstract
Azimuthal single-spin asymmetries of leptoproduced pions and charged kaons were measured on a transversely polarized hydrogen target. Evidence for a naive-T-odd, transverse-momentum-dependent parton distribution function is deduced from nonvanishing Sivers effects for pi(+), pi(0), and K(+/-), as well as in the difference of the pi(+) and pi(-) cross sections.
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Affiliation(s)
- A Airapetian
- Physikalisches Institut, Universität Giessen, 35392 Giessen, Germany
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Airapetian A, Akopov N, Akopov Z, Amarian M, Andrus A, Aschenauer EC, Augustyniak W, Avakian R, Avetissian A, Avetissian E, Bailey P, Balin D, Beckmann M, Belostotski S, Bianchi N, Blok HP, Böttcher H, Borissov A, Borysenko A, Bouwhuis M, Brüll A, Bryzgalov V, Capiluppi M, Capitani GP, Chen T, Ciullo G, Contalbrigo M, Dalpiaz PF, Deconinck W, De Leo R, Demey M, De Nardo L, De Sanctis E, Devitsin E, Di Nezza P, Dreschler J, Düren M, Ehrenfried M, Elalaoui-Moulay A, Elbakian G, Ellinghaus F, Elschenbroich U, Fabbri R, Fantoni A, Felawka L, Frullani S, Funel A, Gapienko G, Gapienko V, Garibaldi F, Garrow K, Gaskell D, Gavrilov G, Gharibyan V, Grebeniouk O, Gregor IM, Hadjidakis C, Hafidi K, Hartig M, Hasch D, Hesselink WHA, Hillenbrand A, Hoek M, Holler Y, Hommez B, Hristova I, Iarygin G, Ivanilov A, Izotov A, Jackson HE, Jgoun A, Kaiser R, Kinney E, Kisselev A, Kobayashi T, Kopytin M, Korotkov V, Kozlov V, Krauss B, Krivokhijine VG, Lagamba L, Lapikás L, Laziev A, Lenisa P, Liebing P, Linden-Levy LA, Lorenzon W, Lu H, Lu J, Lu S, Ma BQ, Maiheu B, Makins NCR, Mao Y, Marianski B, Marukyan H, Masoli F, Mexner V, Meyners N, Michler T, Mikloukho O, Miller CA, Miyachi Y, Muccifora V, Murray M, Nagaitsev A, Nappi E, Naryshkin Y, Negodaev M, Nowak WD, Oganessyan K, Ohsuga H, Osborne A, Pickert N, Potterveld DH, Raithel M, Reggiani D, Reimer PE, Reischl A, Reolon AR, Riedl C, Rith K, Rosner G, Rostomyan A, Rubacek L, Rubin J, Ryckbosch D, Salomatin Y, Sanjiev I, Savin I, Schäfer A, Schnell G, Schüler KP, Seele J, Seidl R, Seitz B, Shanidze R, Shearer C, Shibata TA, Shutov V, Sinram K, Sommer W, Stancari M, Statera M, Steffens E, Steijger JJM, Stenzel H, Stewart J, Stinzing F, Tait P, Tanaka H, Taroian S, Tchuiko B, Terkulov A, Trzcinski A, Tytgat M, Vandenbroucke A, van der Nat PB, van der Steenhoven G, van Haarlem Y, Vikhrov V, Vincter MG, Vogel C, Volmer J, Wang S, Wendland J, Ye Y, Ye Z, Yen S, Zihlmann B, Zupranski P. Beam-charge azimuthal asymmetry and deeply virtual Compton scattering. Int J Clin Exp Med 2007. [DOI: 10.1103/physrevd.75.011103] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Airapetian A, Akopov N, Akopov Z, Amarian M, Andrus A, Aschenauer EC, Augustyniak W, Avakian R, Avetissian A, Avetissian E, Bailey P, Belostotski S, Bianchi N, Blok HP, Böttcher H, Borissov A, Borysenko A, Brüll A, Bryzgalov V, Capiluppi M, Capitani GP, Ciullo G, Contalbrigo M, Dalpiaz PF, Deconinck W, De Leo R, Demey M, De Nardo L, De Sanctis E, Devitsin E, Diefenthaler M, Di Nezza P, Dreschler J, Düren M, Ehrenfried M, Elalaoui-Moulay A, Elbakian G, Ellinghaus F, Elschenbroich U, Fabbri R, Fantoni A, Felawka L, Frullani S, Funel A, Gapienko G, Gapienko V, Garibaldi F, Garrow K, Gavrilov G, Gharibyan V, Giordano F, Grebeniouk O, Gregor IM, Griffioen K, Guler H, Hadjidakis C, Hartig M, Hasch D, Hasegawa T, Hesselink WH, Hillenbrand A, Hoek M, Holler Y, Hommez B, Hristova I, Iarygin G, Ivanilov A, Izotov A, Jackson HE, Jgoun A, Kaiser R, Keri T, Kinney E, Kisselev A, Kobayashi T, Kopytin M, Korotkov V, Kozlov V, Krauss B, Kravchenko P, Krivokhijine VG, Lagamba L, Lapikás L, Lenisa P, Liebing P, Linden-Levy LA, Lorenzon W, Lu J, Lu S, Ma BQ, Maiheu B, Makins NCR, Mao Y, Marianski B, Marukyan H, Masoli F, Mexner V, Meyners N, Michler T, Mikloukho O, Miller CA, Miyachi Y, Muccifora V, Murray M, Nagaitsev A, Nappi E, Naryshkin Y, Negodaev M, Nowak WD, Ohsuga H, Osborne A, Perez-Benito R, Pickert N, Raithel M, Reggiani D, Reimer PE, Reischl A, Roelon AR, Riedl C, Rith K, Rosner G, Rostomyan A, Rubacek L, Rubin J, Ryckbosch D, Salomatin Y, Sanjiev I, Savin I, Schäfer A, Schnell G, Schüler KP, Seele J, Seidl R, Seitz B, Shearer C, Shibata TA, Shutov V, Sinram K, Stancari M, Statera M, Steffens E, Steijger JJM, Stenzel H, Stewart J, Stinzing F, Streit J, Tait P, Tanaka H, Taroian S, Tchuiko B, Terkulov A, Trzcinski A, Tytgat M, Vandenbroucke A, van der Nat PB, van der Steenhoven G, van Haarlem Y, Veretennikov D, Vikhrov V, Vogel C, Wang S, Ye Y, Ye Z, Yen S, Zihlmann B, Zupranski P. Double-hadron leptoproduction in the nuclear medium. Phys Rev Lett 2006; 96:162301. [PMID: 16712217 DOI: 10.1103/physrevlett.96.162301] [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: 10/11/2005] [Indexed: 05/09/2023]
Abstract
The first measurements of double-hadron production in deep-inelastic scattering within the nuclear medium were made with the HERMES spectrometer at DESY HERA using a 27.6 GeV positron beam. By comparing data for deuterium, nitrogen, krypton, and xenon nuclei, the influence of the nuclear medium on the ratio of double-hadron to single-hadron yields was investigated. Nuclear effects on the additional hadron are clearly observed, but with little or no difference among nitrogen, krypton, or xenon, and with smaller magnitude than effects seen on previously measured single-hadron multiplicities. The data are compared with models based on partonic energy loss or prehadronic scattering and with a model based on a purely absorptive treatment of the final-state interactions. Thus, the double-hadron ratio provides an additional tool for studying modifications of hadronization in nuclear matter.
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Affiliation(s)
- A Airapetian
- Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040, USA
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Airapetian A, Akopov N, Akopov Z, Amarian M, Ammosov VV, Andrus A, Aschenauer EC, Augustyniak W, Avakian R, Avetissian A, Avetissian E, Bailey P, Balin D, Baturin V, Beckmann M, Belostotski S, Bernreuther S, Bianchi N, Blok HP, Böttcher H, Borissov A, Borysenko A, Bouwhuis M, Brack J, Brüll A, Bryzgalov V, Capitani GP, Chen T, Chiang HC, Ciullo G, Contalbrigo M, Dalpiaz PF, De Leo R, Demey M, De Nardo L, De Sanctis E, Devitsin E, Di Nezza P, Dreschler J, Düren M, Ehrenfried M, Elalaoui-Moulay A, Elbakian G, Ellinghaus F, Elschenbroich U, Fabbri R, Fantoni A, Fechtchenko A, Felawka L, Fox B, Frullani S, Gapienko G, Gapienko V, Garibaldi F, Garrow K, Garutti E, Gaskell D, Gavrilov G, Gharibyan V, Graw G, Grebeniouk O, Greeniaus LG, Gregor IM, Hafidi K, Hartig M, Hasch D, Heesbeen D, Henoch M, Hertenberger R, Hesselink WHA, Hillenbrand A, Hoek M, Holler Y, Hommez B, Iarygin G, Ivanilov A, Izotov A, Jackson HE, Jgoun A, Kaiser R, Kinney E, Kisselev A, Kopytin M, Korotkov V, Kozlov V, Krauss B, Krivokhijine VG, Lagamba L, Lapikás L, Laziev A, Lenisa P, Liebing P, Linden-Levy LA, Lipka K, Lorenzon W, Lu H, Lu J, Lu S, Ma BQ, Maiheu B, Makins NCR, Mao Y, Marianski B, Marukyan H, Masoli F, Mexner V, Meyners N, Mikloukho O, Miller CA, Miyachi Y, Muccifora V, Nagaitsev A, Nappi E, Naryshkin Y, Nass A, Negodaev M, Nowak WD, Oganessyan K, Ohsuga H, Pickert N, Potashov S, Potterveld DH, Raithel M, Reggiani D, Reimer PE, Reischl A, Reolon AR, Riedl C, Rith K, Rosner G, Rostomyan A, Rubacek L, Rubin J, Ryckbosch D, Salomatin Y, Sanjiev I, Savin I, Schäfer A, Schill C, Schnell G, Schüler KP, Seele J, Seidl R, Seitz B, Shanidze R, Shearer C, Shibata TA, Shutov V, Simani MC, Sinram K, Stancari M, Statera M, Steffens E, Steijger JJM, Stenzel H, Stewart J, Stinzing F, Stösslein U, Tait P, Tanaka H, Taroian S, Tchuiko B, Terkulov A, Tkabladze A, Trzcinski A, Tytgat M, Vandenbroucke A, van der Nat PB, van der Steenhoven G, Vetterli MC, Vikhrov V, Vincter MG, Vogel C, Vogt M, Volmer J, Weiskopf C, Wendland J, Wilbert J, Ye Y, Ye Z, Yen S, Zihlmann B, Zupranski P. Measurement of the tensor structure function b1 of the deuteron. Phys Rev Lett 2005; 95:242001. [PMID: 16384369 DOI: 10.1103/physrevlett.95.242001] [Citation(s) in RCA: 1] [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: 06/08/2005] [Indexed: 05/05/2023]
Abstract
The Hermes experiment has investigated the tensor spin structure of the deuteron using the 27.6 GeV/c positron beam of DESY HERA. The use of a tensor-polarized deuteron gas target with only a negligible residual vector polarization enabled the first measurement of the tensor asymmetry A(d)zz and the tensor structure function b(d)1 for average values of the Bjorken variable 0.01< <x> <0.45 and of the negative of the squared four-momentum transfer 0.5 GeV2 < <Q2> <5 GeV2. The quantities A(d)zz and b(d)1 are found to be nonzero. The rise of b(d)1 for decreasing values of x can be interpreted to originate from the same mechanism that leads to nuclear shadowing in unpolarized scattering.
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Affiliation(s)
- A Airapetian
- Yerevan Physics Institute, 375036 Yerevan, Armenia
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Rathmann F, Lenisa P, Steffens E, Contalbrigo M, Dalpiaz PF, Kacharava A, Lehrach A, Lorentz B, Maier R, Prasuhn D, Ströher H. A method to polarize stored antiprotons to a high degree. Phys Rev Lett 2005; 94:014801. [PMID: 15698088 DOI: 10.1103/physrevlett.94.014801] [Citation(s) in RCA: 1] [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: 10/09/2004] [Indexed: 05/24/2023]
Abstract
Polarized antiprotons can be produced in a storage ring by spin-dependent interaction in a purely electron-polarized hydrogen gas target. The polarizing process is based on spin transfer from the polarized electrons of the target atoms to the orbiting antiprotons. After spin filtering for about two beam lifetimes at energies T approximately equal 40-170 MeV using a dedicated large acceptance ring, the antiproton beam polarization would reach P=0.2-0.4. Polarized antiprotons would open new and unique research opportunities for spin-physics experiments in p(-) p interactions.
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Affiliation(s)
- F Rathmann
- Institut für Kernphysik, Forschungzentrum Jülich, 52428 Jülich, Germany.
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Airapetian A, Akopov N, Akopov Z, Amarian M, Andrus A, Aschenauer EC, Augustyniak W, Avakian R, Avetissian A, Avetissian E, Bacchetta A, Bailey P, Balin D, Beckmann M, Belostotski S, Bianchi N, Blok HP, Böttcher H, Borissov A, Borysenko A, Bouwhuis M, Brüll A, Bryzgalov V, Capitani GP, Cappiluppi M, Chen T, Ciullo G, Contalbrigo M, Dalpiaz PF, Leo RD, Demey M, Nardo LD, Sanctis ED, Devitsin E, Nezza PD, Düren M, Ehrenfried M, Elalaoui-Moulay A, Elbakian G, Ellinghaus F, Elschenbroich U, Fabbri R, Fantoni A, Fechtchenko A, Felawka L, Frullani S, Gapienko G, Gapienko V, Garibaldi F, Garrow K, Gavrilov G, Gharibyan V, Grebeniouk O, Gregor IM, Hadjidakis C, Hafidi K, Hartig M, Hasch D, Henoch M, Hesselink WHA, Hillenbrand A, Hoek M, Holler Y, Hommez B, Hristova I, Iarygin G, Ilyichev A, Ivanilov A, Izotov A, Jackson HE, Jgoun A, Kaiser R, Kinney E, Kisselev A, Kobayashi T, Kopytin M, Korotkov V, Kozlov V, Krauss B, Krivokhijine VG, Lagamba L, Lapikás L, Laziev A, Lenisa P, Liebing P, Linden-Levy LA, Lorenzon W, Lu H, Lu J, Lu S, Ma BQ, Maiheu B, Makins NCR, Mao Y, Marianski B, Marukyan H, Masoli F, Mexner V, Meyners N, Michler T, Mikloukho O, Miller CA, Miyachi Y, Muccifora V, Nagaitsev A, Nappi E, Naryshkin Y, Nass A, Negodaev M, Nowak WD, Oganessyan K, Ohsuga H, Osborne A, Pickert N, Potterveld DH, Raithel M, Reggiani D, Reimer PE, Reischl A, Reolon AR, Riedl C, Rith K, Rosner G, Rostomyan A, Rubacek L, Rubin J, Ryckbosch D, Salomatin Y, Sanjiev I, Savin I, Schäfer A, Schill C, Schnell G, Schüler KP, Seele J, Seidl R, Seitz B, Shanidze R, Shearer C, Shibata TA, Shutov V, Sinram K, Sommer W, Stancari M, Statera M, Steffens E, Steijger JJM, Stenzel H, Stewart J, Stinzing F, Tait P, Tanaka H, Taroian S, Tchuiko B, Terkulov A, Trzcinski A, Tytgat M, Vandenbroucke A, van der Nat PB, van der Steenhoven G, van Haarlem Y, Vetterli MC, Vikhrov V, Vincter MG, Vogel C, Volmer J, Wang S, Wendland J, Wilbert J, Smit GY, Ye Y, Ye Z, Yen S, Zihlmann B, Zupranski P. Single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target. Phys Rev Lett 2005; 94:012002. [PMID: 15698069 DOI: 10.1103/physrevlett.94.012002] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2004] [Indexed: 05/24/2023]
Abstract
Single-spin asymmetries for semi-inclusive electroproduction of charged pions in deep-inelastic scattering of positrons are measured for the first time with transverse target polarization. The asymmetry depends on the azimuthal angles of both the pion (phi) and the target spin axis (phi(S)) about the virtual-photon direction and relative to the lepton scattering plane. The extracted Fourier component sin((phi+phi(S))(pi)(UT) is a signal of the previously unmeasured quark transversity distribution, in conjunction with the Collins fragmentation function, also unknown. The component sin((phi-phi(S)(pi)(UT) arises from a correlation between the transverse polarization of the target nucleon and the intrinsic transverse momentum of quarks, as represented by the previously unmeasured Sivers distribution function. Evidence for both signals is observed, but the Sivers asymmetry may be affected by exclusive vector meson production.
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Affiliation(s)
- A Airapetian
- Randall Laboratory of Physics, University of Michigan, Ann Arbor, MI 48109-1120, USA
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Airapetian A, Akopov N, Akopov Z, Amarian M, Ammosov VV, Andrus A, Aschenauer EC, Augustyniak W, Avakian R, Avetissian A, Avetissian E, Bailey P, Baturin V, Baumgarten C, Beckmann M, Belostotski S, Bernreuther S, Bianchi N, Blok HP, Böttcher H, Borissov A, Bouwhuis M, Brack J, Brüll A, Bryzgalov V, Capitani GP, Chiang HC, Ciullo G, Contalbrigo M, Dalpiaz PF, De Leo R, De Nardo L, De Sanctis E, Devitsin E, Di Nezza P, Düren M, Ehrenfried M, Elalaoui-Moulay A, Elbakian G, Ellinghaus F, Elschenbroich U, Ely J, Fabbri R, Fantoni A, Fechtchenko A, Felawka L, Fox B, Franz J, Frullani S, Gärber Y, Gapienko G, Gapienko V, Garibaldi F, Garrow K, Garutti E, Gaskell D, Gavrilov G, Gharibyan V, Graw G, Grebeniouk O, Greeniaus LG, Hafidi K, Hartig M, Hasch D, Heesbeen D, Henoch M, Hertenberger R, Hesselink WHA, Hillenbrand A, Hoek M, Holler Y, Hommez B, Iarygin G, Ivanilov A, Izotov A, Jackson HE, Jgoun A, Kaiser R, Kinney E, Kisselev A, Königsmann K, Kopytin M, Korotkov V, Kozlov V, Krauss B, Krivokhijine VG, Lagamba L, Lapikás L, Laziev A, Lenisa P, Liebing P, Lindemann T, Lipka K, Lorenzon W, Lu J, Maiheu B, Makins NCR, Marianski B, Marukyan H, Masoli F, Mexner V, Meyners N, Mikloukho O, Miller CA, Miyachi Y, Muccifora V, Nagaitsev A, Nappi E, Naryshkin Y, Nass A, Negodaev M, Nowak WD, Oganessyan K, Ohsuga H, Orlandi G, Pickert N, Potashov S, Potterveld DH, Raithel M, Reggiani D, Reimer PE, Reischl A, Reolon AR, Riedl C, Rith K, Rosner G, Rostomyan A, Rubacek L, Ryckbosch D, Salomatin Y, Sanjiev I, Savin I, Scarlett C, Schäfer A, Schill C, Schnell G, Schüler KP, Schwind A, Seele J, Seidl R, Seitz B, Shanidze R, Shearer C, Shibata TA, Shutov V, Simani MC, Sinram K, Stancari M, Statera M, Steffens E, Steijger JJM, Stewart J, Stösslein U, Tait P, Tanaka H, Taroian S, Tchuiko B, Terkulov A, Tkabladze A, Trzcinski A, Tytgat M, Vandenbroucke A, Van Der Nat P, Van Der Steenhoven G, Vetterli MC, Vikhrov V, Vincter MG, Visser J, Vogel C, Vogt M, Volmer J, Weiskopf C, Wendland J, Wilbert J, Ybeles Smit G, Yen S, Zihlmann B, Zohrabian H, Zupranski P. Flavor decomposition of the sea-quark helicity distributions in the nucleon from semiinclusive deep inelastic scattering. Phys Rev Lett 2004; 92:012005. [PMID: 14753985 DOI: 10.1103/physrevlett.92.012005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2003] [Indexed: 05/24/2023]
Abstract
Double-spin asymmetries of semiinclusive cross sections for the production of identified pions and kaons have been measured in deep inelastic scattering of polarized positrons on a polarized deuterium target. Five helicity distributions including those for three sea quark flavors were extracted from these data together with reanalyzed previous data for identified pions from a hydrogen target. These distributions are consistent with zero for all three sea flavors. A recently predicted flavor asymmetry in the polarization of the light quark sea appears to be disfavored by the data.
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Affiliation(s)
- A Airapetian
- Yerevan Physics Institute, 375036 Yerevan, Armenia
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Airapetian A, Akopov N, Akopov Z, Amarian M, Ammosov VV, Aschenauer EC, Avakian H, Avakian R, Avetissian A, Avetissian E, Bailey P, Baturin V, Baumgarten C, Beckmann M, Belostotski S, Bernreuther S, Bianchi N, Blok HP, Böttcher H, Borissov A, Bouhali O, Bouwhuis M, Brack J, Brauksiepe S, Brüll A, Brunn I, Bulten HJ, Capitani GP, Cisbani E, Ciullo G, Court GR, Dalpiaz PF, De Leo R, De Nardo L, De Sanctis E, Devitsin E, de Witt Huberts PKA, Di Nezza P, Düren M, Ehrenfried M, Elbakian G, Ellinghaus F, Elschenbroich U, Ely J, Fabbri R, Fantoni A, Fechtchenko A, Felawka L, Filippone BW, Fischer H, Fox B, Franz J, Frullani S, Gärber Y, Gapienko V, Garibaldi F, Garutti E, Gavrilov G, Gharibyan V, Graw G, Grebeniouk O, Green PW, Greeniaus LG, Gute A, Haeberli W, Hafidi K, Hartig M, Hasch D, Heesbeen D, Heinsius FH, Henoch M, Hertenberger R, Hesselink WHA, Hofman G, Holler Y, Holt RJ, Hommez B, Iarygin G, Izotov A, Jackson HE, Jgoun A, Jung P, Kaiser R, Kinney E, Kisselev A, Kitching P, Königsmann K, Kolster H, Kopytin M, Korotkov V, Kotik E, Kozlov V, Krauss B, Krivokhijine VG, Kyle G, Lagamba L, Laziev A, Lenisa P, Liebing P, Lindemann T, Lorenzon W, Maas A, Makins NCR, Marukyan H, Masoli F, Menden F, Mexner V, Meyners N, Mikloukho O, Miller CA, Muccifora V, Nagaitsev A, Nappi E, Naryshkin Y, Nass A, Negodaeva K, Nowak WD, Oganessyan K, Orlandi G, Podiatchev S, Potashov S, Potterveld DH, Raithel M, Rappoport V, Reggiani D, Reimer P, Reischl A, Reolon AR, Rith K, Rostomyan A, Ryckbosch D, Sakemi Y, Sanjiev I, Sato F, Savin I, Scarlett C, Schäfer A, Schill C, Schmidt F, Schnell G, Schüler KP, Schwind A, Seibert J, Seitz B, Shanidze R, Shibata TA, Shutov V, Simani MC, Sinram K, Stancari M, Steffens E, Steijger JJM, Stewart J, Stösslein U, Suetsugu K, Taroian S, Terkulov A, Tessarin S, Thomas E, Tipton B, Tytgat M, Urciuoli GM, van den Brand JFJ, van der Steenhoven G, van de Vyver R, Vetterli MC, Vikhrov V, Vincter MG, Visser J, Volmer J, Weiskopf C, Wendland J, Wilbert J, Wise T, Yen S, Yoneyama S, Zihlmann B, Zohrabian H. Evidence for quark-hadron duality in the proton spin asymmetry A1. Phys Rev Lett 2003; 90:092002. [PMID: 12689215 DOI: 10.1103/physrevlett.90.092002] [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: 09/11/2002] [Indexed: 05/24/2023]
Abstract
Spin-dependent lepton-nucleon scattering data have been used to investigate the validity of the concept of quark-hadron duality for the spin asymmetry A1. Longitudinally polarized positrons were scattered off a longitudinally polarized hydrogen target for values of Q2 between 1.2 and 12 GeV2 and values of W2 between 1 and 4 GeV2. The average double-spin asymmetry in the nucleon resonance region is found to agree with that measured in deep-inelastic scattering at the same values of the Bjorken scaling variable x. This finding implies that the description of A1 in terms of quark degrees of freedom is valid also in the nucleon resonance region for values of Q2 above 1.6 GeV2.
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Affiliation(s)
- A Airapetian
- Yerevan Physics Institute, 375036, Yerevan, Armenia
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9
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Airapetian A, Akopov N, Akopov Z, Amarian M, Ammosov VV, Andrus A, Aschenauer EC, Augustyniak W, Avakian R, Avetissian A, Avetissian E, Bailey P, Baturin V, Baumgarten C, Beckmann M, Belostotski S, Bernreuther S, Bianchi N, Blok HP, Böttcher H, Borissov A, Bouwhuis M, Brack J, Brüll A, Brunn I, Capitani GP, Chiang HC, Ciullo G, Contalbrigo M, Court GR, Dalpiaz PF, De Leo R, De Nardo L, De Sanctis E, Devitsin E, Di Nezza P, Düren M, Ehrenfried M, Elalaoui-Moulay A, Elbakian G, Ellinghaus F, Elschenbroich U, Ely J, Fabbri R, Fantoni A, Fechtchenko A, Felawka L, Fox B, Franz J, Frullani S, Gärber Y, Gapienko G, Gapienko V, Garibaldi F, Garutti E, Gaskell D, Gavrilov G, Gharibyan V, Graw G, Grebeniouk O, Greeniaus LG, Haeberli W, Hafidi K, Hartig M, Hasch D, Heesbeen D, Henoch M, Hertenberger R, Hesselink WHA, Hillenbrand A, Holler Y, Hommez B, Iarygin G, Izotov A, Jackson HE, Jgoun A, Kaiser R, Kinney E, Kisselev A, Königsmann K, Kolster H, Kopytin M, Korotkov V, Kozlov V, Krauss B, Krivokhijine VG, Lagamba L, Lapikás L, Laziev A, Lenisa P, Liebing P, Lindemann T, Lorenzon W, Makins NCR, Marukyan H, Masoli F, Menden F, Mexner V, Meyners N, Mikloukho O, Miller CA, Miyachi Y, Muccifora V, Nagaitsev A, Nappi E, Naryshkin Y, Nass A, Negodaeva K, Nowak WD, Oganessyan K, Ohsuga H, Orlandi G, Podiatchev S, Potashov S, Potterveld DH, Raithel M, Reggiani D, Reimer P, Reischl A, Reolon AR, Rith K, Rosner G, Rostomyan A, Ryckbosch D, Sanjiev I, Savin I, Scarlett C, Schäfer A, Schill C, Schnell G, Schüler KP, Schwind A, Seibert J, Seitz B, Shanidze R, Shibata TA, Shutov V, Simani MC, Sinram K, Stancari M, Statera M, Steffens E, Steijger JJM, Stewart J, Stösslein U, Tanaka H, Taroian S, Tchuiko B, Terkulov A, Tessarin S, Thomas E, Tkabladze A, Trzcinski A, Tytgat M, Urciuoli GM, Van Der Nat P, Van Der Steenhoven G, Van De Vyver R, Vetterli MC, Vikhrov V, Vincter MG, Visser J, Vogt M, Volmer J, Weiskopf C, Wendland J, Wilbert J, Wise T, Yen S, Yoneyama S, Zihlmann B, Zohrabian H, Zupranski P. Q2 dependence of nuclear transparency for exclusive rho0 production. Phys Rev Lett 2003; 90:052501. [PMID: 12633347 DOI: 10.1103/physrevlett.90.052501] [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: 09/30/2002] [Indexed: 05/24/2023]
Abstract
Exclusive coherent and incoherent electroproduction of the rho(0) meson from 1H and 14N targets has been studied at the HERMES experiment as a function of coherence length (l(c)), corresponding to the lifetime of hadronic fluctuations of the virtual photon, and squared four-momentum of the virtual photon (-Q2). The ratio of 14N to 1H cross sections per nucleon, called nuclear transparency, was found to increase (decrease) with increasing l(c) for coherent (incoherent) rho(0) electroproduction. For fixed l(c), a rise of nuclear transparency with Q2 is observed for both coherent and incoherent rho(0) production, which is in agreement with theoretical calculations of color transparency.
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Airapetian A, Akopov N, Amarian M, Aschenauer EC, Avakian H, Avakian R, Avetissian A, Avetissian E, Bains B, Baumgarten C, Beckmann M, Belostotski S, Belz JE, Benisch T, Bernreuther S, Bianchi N, Blouw J, Böttcher H, Borissov A, Bouwhuis M, Brack J, Brauksiepe S, Braun B, Bray B, Brons S, Brückner W, Brüll A, Bruins EEW, Bulten HJ, Capitani GP, Carter P, Chumney P, Cisbani E, Court GR, Dalpiaz PF, De Sanctis E, De Schepper D, Devitsin E, de Witt Huberts PKA, Di Nezza P, Düren M, Dvoredsky A, Elbakian G, Ely J, Fantoni A, Fechtchenko A, Ferstl M, Fiedler K, Filippone BW, Fischer H, Fox B, Franz J, Frullani S, Funk MA, Gärber Y, Gao H, Garibaldi F, Gavrilov G, Geiger P, Gharibyan V, Golendukhin A, Graw G, Grebeniouk O, Green PW, Greeniaus LG, Grosshauser C, Guidal M, Gute A, Gyurjyan V, Haas JP, Haeberli W, Hansen JO, Hartig M, Hasch D, Häusser O, Heinsius FH, Henderson R, Henoch M, Hertenberger R, Holler Y, Holt RJ, Hoprich W, Ihssen H, Iodice M, Izotov A, Jackson HE, Jgoun A, Kaiser R, Kinney E, Kisselev A, Kitching P, Kobayashi H, Koch N, Königsmann K, Kolstein M, Kolster H, Korotkov V, Korsch W, Kozlov V, Kramer LH, Krivokhijine VG, Kurisuno M, Kyle G, Lachnit W, Lenisa P, Lorenzon W, Makins NCR, Martens FK, Martin JW, Masoli F, Mateos A, McAndrew M, McIlhany K, McKeown RD, Meissner F, Menden F, Metz A, Meyners N, Mikloukho O, Miller CA, Miller MA, Milner R, Most A, Muccifora V, Mussa R, Nagaitsev A, Naryshkin Y, Nathan AM, Neunreither F, Niczyporuk M, Nowak WD, Nupieri M, Oganessyan KA, O'Neill TG, Openshaw R, Ouyang J, Owen BR, Papavassiliou V, Pate SF, Pitt M, Potashov S, Potterveld DH, Rakness G, Reali A, Redwine R, Reolon AR, Ristinen R, Rith K, Rossi P, Rudnitsky S, Ruh M, Ryckbosch D, Sakemi Y, Savin I, Scarlett C, Schäfer A, Schmidt F, Schmitt H, Schnell G, Schüler KP, Schwind A, Seibert J, Shibata TA, Shibatani K, Shin T, Shutov V, Simani C, Simon A, Sinram K, Slavich P, Spengos M, Steffens E, Stenger J, Stewart J, Stoesslein U, Sutter M, Tallini H, Taroian S, Terkulov A, Teryaev O, Thomas E, Tipton B, Tytgat M, Urciuoli GM, van den Brand JFJ, van der Steenhoven G, van de Vyver R, van Hunen JJ, Vetterli MC, Vikhrov V, Vincter MG, Visser J, Volk E, Wander W, Wendland J, Williamson SE, Wise T, Woller K, Yoneyama S, Zohrabian H. Evidence for a single-spin azimuthal asymmetry in semi-inclusive pion electroproduction. Phys Rev Lett 2000; 84:4047-4051. [PMID: 10990607 DOI: 10.1103/physrevlett.84.4047] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/1999] [Indexed: 05/23/2023]
Abstract
Single-spin asymmetries for semi-inclusive pion production in deep-inelastic scattering have been measured for the first time. A significant target-spin asymmetry of the distribution in the azimuthal angle straight phi of the pion relative to the lepton scattering plane was formed for pi(+) electroproduction on a longitudinally polarized hydrogen target. The corresponding analyzing power in the sinstraight phi moment of the cross section is 0.022+/-0.005+/-0.003. This result can be interpreted as the effect of terms in the cross section involving chiral-odd spin distribution functions in combination with a chiral-odd fragmentation function that is sensitive to the transverse polarization of the fragmenting quark.
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Armstrong TA, Bettoni D, Bharadwaj V, Biino C, Borreani G, Broemmelsiek D, Buzzo A, Calabrese R, Ceccucci A, Cester R, Church M, Dalpiaz P, Dalpiaz PF, Dimitroyannis D, Fabbri M, Fast J, Gianoli A, Ginsburg CM, Gollwitzer K, Govi G, Hahn A, Hasan M, Hsueh S, Lewis R, Luppi E, Macrí M, Majewska AM, Mandelkern M, Marchetto F, Marinelli M, Marques J, Marsh W, Martini M, Masuzawa M, Menichetti E, Migliori A, Mussa R, Palestini S, Pallavicini M, Passaggio S, Pastrone N, Patrignani C, Peoples J, Petrucci F, Pia MG, Pordes S, Rapidis P, Ray R, Reid J, Rinaudo G, Roccuzzo B, Rosen J, Santroni A, Sarmiento M, Savriè M, Schultz J, Seth KK, Smith AJ, Smith GA, Sozzi M, Trokenheim S, Weber MF, Werkema S, Zhang Y. Observation of the radiative decay J/ psi -->e+e- gamma. Phys Rev D Part Fields 1996; 54:7067-7070. [PMID: 10020715 DOI: 10.1103/physrevd.54.7067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Armstrong TA, Bettoni D, Bharadwaj V, Biino C, Blanford G, Borreani G, Broemmelsiek D, Buzzo A, Calabrese R, Ceccucci A, Cester R, Church M, Dalpiaz P, Dalpiaz PF, Dimitroyannis D, Fabbri M, Fast J, Gianoli A, Ginsburg CM, Gollwitzer K, Govi G, Hahn A, Hasan M, Hsueh S, Lewis R, Luppi E, Macrí M, Majewska AM, Mandelkern M, Marchetto F, Marinelli M, Marques J, Marsh W, Martini M, Masuzawa M, Menichetti E, Migliori A, Mussa R, Palestini S, Pallavicini M, Passaggio S, Pastrone N, Patrignani C, Peoples J, Petrucci F, Pia MG, Pordes S, Rapidis P, Ray R, Reid J, Rinaudo G, Roccuzzo B, Rosen J, Santroni A, Sarmiento M, Savrré M, Schultz J, Seth KK, Smith A, Smith GA, Sozzi M, Trokenheim S, Weber MF, Werkema S. Study of the eta c(1 (1)S0) state of charmonium formed in p-barp annihilations and a search for the eta c'(2 (1)S0). Phys Rev D Part Fields 1995; 52:4839-4854. [PMID: 10019708 DOI: 10.1103/physrevd.52.4839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Armstrong TA, Bettoni D, Bharadwaj V, Biino C, Borreani G, Broemmelsiek D, Buzzo A, Calabrese R, Ceccucci A, Cester R, Church MD, Dalpiaz P, Dalpiaz PF, Dibenedetto R, Dimitroyannis D, Fabbri MG, Fast JE, Gianoli A, Ginsburg CM, Gollwitzer KE, Hahn AA, Hasan MA, Hsueh SY, Lewis RA, Luppi E, Macrí M, Majewska AM, Mandelkern MA, Marchetto F, Marinelli M, Marques JL, Marsh W, Martini M, Masuzawa M, Menichetti E, Migliori A, Mussa R, Palestini S, Pallavicini M, Pastrone N, Patrignani C, Peoples J, Pesando L, Petrucci F, Pia MG, Pordes S, Rapidis PA, Ray RE, Reid JD, Rinaudo G, Roccuzzo B, Rosen JL, Santroni A, Sarmiento M, Savrié M, Scalisi A, Schultz J, Seth KK, Smith A, Smith GA, Sozzi M, Trokenheim S, Weber MF, Werkema SJ. Study of the angular distribution of the reaction p-barp--> chi c2-->J/ psi gamma -->e+e- gamma. Phys Rev D Part Fields 1993; 48:3037-3044. [PMID: 10016557 DOI: 10.1103/physrevd.48.3037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Armstrong TA, Bettoni D, Bharadwaj V, Biino C, Borreani G, Broemmelsiek D, Buzzo A, Calabrese R, Ceccucci A, Cester R, Church M, Dalpiaz P, Dalpiaz PF, Dibenedetto R, Dimitroyannis D, Fabbri M, Fast J, Gianoli A, Ginsburg CM, Gollwitzer K, Hahn A, Hasan MA, Hsueh S, Lewis R, Luppi E, Macrí M, Majewska AM, Mandelkern M, Marchetto F, Marinelli M, Marques J, Marsh W, Martini M, Masuzawa M, Menichetti E, Migliori A, Mussa R, Palestini S, Pallavicini M, Pastrone N, Patrignani C, Peoples J, Pesando L, Petrucci F, Pia MG, Rapidis PA, Ray R, Reid J, Rinaudo G, Roccuzzo B, Rosen J, Santroni A, Sarmiento M, Savrié M, Scalisi A, Schultz J, Seth KK, Smith A, Smith GA, Sozzi M, Trokenheim S, Weber MF, Werkema S, Zhang Y. Measurement of the gamma gamma partial width of the chi 2 charmonium resonance. Phys Rev Lett 1993; 70:2988-2991. [PMID: 10053747 DOI: 10.1103/physrevlett.70.2988] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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15
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Armstrong TA, Bettoni D, Bharadwaj V, Biino C, Borreani G, Broemmelsiek D, Buzzo A, Calabrese R, Ceccucci A, Cester R, Church MD, Dalpiaz P, Dalpiaz PF, Dibenedetto R, Dimitroyannis D, Fabbri MG, Fast JE, Gianoli A, Ginsburg CM, Gollwitzer KE, Hahn AA, Hasan MA, Hsueh SY, Lewis RA, Luppi E, Macrí M, Majewska A, Mandelkern MA, Marchetto F, Marinelli M, Marques JL, Marsh W, Martini M, Masuzawa M, Menichetti E, Migliori A, Mussa R, Palestini S, Pallavicini M, Pastrone N, Patrignani C, Peoples J, Pesando L, Petrucci F, Pia MG, Pordes S, Rapidis PA, Ray RE, Reid JD, Rinaudo G, Roccuzzo B, Rosen JL, Santroni A, Sarmiento M, Savriè M, Scalisi A, Schultz J, Seth KK, Smith A, Smith GA, Sozzi M, Trokenheim S, Weber MF, Werkema SJ. Proton electromagnetic form factors in the timelike region from 8.9 to 13.0 GeV2. Phys Rev Lett 1993; 70:1212-1215. [PMID: 10054319 DOI: 10.1103/physrevlett.70.1212] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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16
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Armstrong TA, Bettoni D, Bharadwaj V, Biino C, Borreani G, Broemmelsiek D, Buzzo A, Calabrese R, Ceccucci A, Cester R, Church MD, Dalpiaz P, Dalpiaz PF, Dibenedetto R, Dimitroyannis D, Fabbri MG, Fast JE, Gianoli A, Ginsburg CM, Gollwitzer KE, Hahn AA, Hasan MA, Hsueh SY, Lewis RA, Luppi E, Macrí M, Majewska A, Mandelkern MA, Marchetto F, Marinelli M, Marques JL, Marsh W, Martini M, Masuzawa M, Menichetti E, Migliori A, Mussa R, Palestini S, Pallavicini M, Passaggio S, Pastrone N, Patrignani C, Peoples J, Pesando L, Petrucci F, Pia MG, Pordes S, Rapidis PA, Ray RE, Reid JD, Rinaudo G, Roccuzzo B, Rosen JL, Sarmiento M, Savriè M, Scalisi A, Schultz J, Seth KK, Smith A, Smith GA, Sozzi M, Tecchio L, Trokenheim S, Weber MF. Measurement of the J/ psi and psi ' resonance parameters in p-barp annihilation. Phys Rev D Part Fields 1993; 47:772-783. [PMID: 10015638 DOI: 10.1103/physrevd.47.772] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Armstrong TA, Bettoni D, Bharadwaj V, Biino C, Borreani G, Broemmelsiek D, Buzzo A, Calabrese R, Ceccucci A, Cester R, Church M, Dalpiaz P, Dalpiaz PF, Dibenedetto R, Dimitroyannis D, Fabbri MG, Fast J, Gianoli A, Ginsburg CM, Gollwitzer K, Hahn A, Hasan M, Hsueh S, Lewis R, Luppi E, Macrí M, Majewska AM, Mandelkern M, Marchetto F, Marinelli M, Marques J, Marsh W, Martini M, Masuzawa M, Menichetti E, Migliori A, Mussa R, Palestini S, Pallavicini M, Pastrone N, Patrignani C, Peoples J, Pesando L, Petrucci F, Pia MG, Pordes S, Rapidis P, Ray R, Reid J, Rinaudo G, Roccuzzo B, Rosen J, Santroni A, Sarmiento M, Savrie M, Scalisi A, Schultz J, Seth KK, Smith A, Smith GA, Sozzi M, Trokenheim S, Weber MF, Werkema S. Observation of the 1P1 state of charmonium. Phys Rev Lett 1992; 69:2337-2340. [PMID: 10046459 DOI: 10.1103/physrevlett.69.2337] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Armstrong TA, Bettoni D, Bharadwaj V, Biino C, Borreani G, Broemmelsiek D, Buzzo A, Calabrese R, Ceccucci A, Cester R, Church MD, Dalpiaz P, Dalpiaz PF, Fast JE, Ferroni S, Ginsburg CM, Gollwitzer KE, Hahn AA, Hasan MA, Hsueh SY, Lewis RA, Luppi E, Macr M, Majewska A, Mandelkern MA, Marchetto F, Marinelli M, Marques JL, Marsh W, Martini M, Masuzawa M, Menichetti E, Migliori A, Mussa R, Palestini S, Pastrone N, Patrignani C, Peoples J, Pesando L, Petrucci F, Pia MG, Pordes S, Rapidis PA, Ray RE, Reid JD, Rinaudo G, Rosen JL, Santroni A, Sarmiento M, Savrié M, Schultz J, Seth KK, Smith GA, Tecchio L, Tommasini F, Trokenheim S, Weber MF, Werkema SJ, Zhao JL, Zito M. Precision measurements of charmonium states formed in pp-bar annihilation. Phys Rev Lett 1992; 68:1468-1471. [PMID: 10045139 DOI: 10.1103/physrevlett.68.1468] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Bassompierre G, Schneegans MA, Binder G, Gissinger G, Jacquey S, Dalpiaz P, Dalpiaz PF, Peroni C, Tecchio L. Electron-positron pair production in p - p annihilation at rest and related determination of the electromagnetic form factor of the proton in the timelike region. ACTA ACUST UNITED AC 1983. [DOI: 10.1007/bf02724235] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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