Common suppression pattern of η and π0 mesons at high transverse momentum in Au plus Au collisions at √SNN=200 GeV

被引:362
作者
Adler, S. S. [1 ]
Afanasiev, S.
Aidala, C.
Ajitanand, N. N.
Akiba, Y.
Alexander, J.
Amirikas, R.
Aphecetche, L.
Aronson, S. H.
Averbeck, R.
Awes, T. C.
Azmoun, R.
Babintsev, V.
Baldisseri, A.
Barish, K. N.
Barnes, P. D.
Bassalleck, B.
Bathe, S.
Batsouli, S.
Baublis, V.
Bazilevsky, A.
Belikov, S.
Berdnikov, Y.
Bhagavatula, S.
Boissevain, J. G.
Borel, H.
Borenstein, S.
Brooks, M. L.
Brown, D. S.
Bruner, N.
Bucher, D.
Buesching, H.
Bumazhnov, V.
Bunce, G.
Burward-Hoy, J. M.
Butsyk, S.
Camard, X.
Chai, J. -S.
Chand, P.
Chang, W. C.
Chernichenko, S.
Chi, C. Y.
Chiba, J.
Chiu, M.
Choi, I. J.
Choi, J.
Choudhury, R. K.
Chujo, T.
Cianciolo, V.
Cobigo, Y.
机构
[1] Brookhaven Natl Lab, Upton, NY 11973 USA
[2] Abilene Christian Univ, Abilene, TX 79699 USA
[3] Acad Sinica, Inst Phys, Taipei 11529, Taiwan
[4] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India
[5] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India
[6] Univ Calif Riverside, Riverside, CA 92521 USA
[7] China Inst Atom Energy, Beijing, Peoples R China
[8] Univ Tokyo, Grad Sch Sci, Ctr Nucl Study, Bunkyo Ku, Tokyo 1130033, Japan
[9] Columbia Univ, New York, NY 10027 USA
[10] Nevis Labs, Irvington, NY 10533 USA
[11] CEA Saclay, Dapnia, F-91191 Gif Sur Yvette, France
[12] Debrecen Univ, H-4010 Debrecen, Hungary
[13] Florida State Univ, Tallahassee, FL 32306 USA
[14] Georgia State Univ, Atlanta, GA 30303 USA
[15] Hiroshima Univ, Higashihiroshima 7398526, Japan
[16] Inst High Energy Phys, State Res Ctr Russian Federat, Protvino 142281, Russia
[17] Univ Illinois, Urbana, IL 61801 USA
[18] Iowa State Univ, Ames, IA 50011 USA
[19] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia
[20] KAERI, Cyclotron Applicat Lab, Seoul, South Korea
[21] Kangnung Natl Univ, Kangnung 210702, South Korea
[22] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan
[23] Hungarian Acad Sci, KFKI Res Inst Particle & Nucl Phys, MTA KFKI RMKI, H-1525 Budapest, Hungary
[24] Korea Univ, Seoul 136701, South Korea
[25] Russian Res Ctr, IV Kurchatov Atom Energy Inst, Moscow, Russia
[26] Kyoto Univ, Kyoto 6068502, Japan
[27] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France
[28] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[29] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[30] Univ Clermont Ferrand, LPC, CNRS, IN2P3, F-63177 Aubiere, France
[31] Lund Univ, Dept Phys, SE-22100 Lund, Sweden
[32] Univ Munster, Inst Kernphys, D-48149 Munster, Germany
[33] Myongji Univ, Yongin 449728, Kyonggido, South Korea
[34] Nagasaki Inst Appl Sci, Nagasaki 8510193, Japan
[35] Univ New Mexico, Albuquerque, NM 87131 USA
[36] New Mexico State Univ, Las Cruces, NM 88003 USA
[37] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
[38] Univ Paris 11, IPN Orsay, CNRS, IN2P3, F-91406 Orsay, France
[39] Petersburg Nucl Phys Inst, Gatchina 188300, Leningrad Regi, Russia
[40] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan
[41] Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA
[42] St Petersburg State Polytech Univ, St Petersburg, Russia
[43] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil
[44] Seoul Natl Univ, Syst Elect Lab, Seoul, South Korea
[45] SUNY Stony Brook, Stony Brook Univ, Dept Chem, Stony Brook, NY 11794 USA
[46] SUNY Stony Brook, Stony Brook Univ, Dept Phys & Astron, Stony Brook, NY 11794 USA
[47] Univ Nantes, CNRS, IN2P3, Ecole Mines Nantes,SUBATECH, F-44307 Nantes, France
[48] Univ Tennessee, Knoxville, TN 37996 USA
[49] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan
[50] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 305, Japan
关键词
D O I
10.1103/PhysRevLett.96.202301
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Inclusive transverse momentum spectra of eta mesons have been measured within p(T)=2-10 GeV/c at midrapidity by the PHENIX experiment in Au+Au collisions at root s(NN) = 200 GeV. In central Au+Au the eta yields are significantly suppressed compared to peripheral Au+Au, d+Au, and p+p yields scaled by the corresponding number of nucleon-nucleon collisions. The magnitude, centrality, and p(T) dependence of the suppression is common, within errors, for eta and pi(0). The ratio of eta to pi(0) spectra at high p(T) amounts to 0.40 < R-eta/pi(0)< 0.48 for the three systems, in agreement with the world average measured in hadronic and nuclear reactions and, at large scaled momentum, in e(+)e(-) collisions.
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页数:6
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