Phys. Rev. C
70,
041901(R)
(2004)
[6 pages]
Rapidity and centrality dependence of proton and antiproton production from 197Au+197Au collisions at √SNN=130 GeV
J. Adams et al. STAR Collaboration
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J. Adams3, C. Adler12, M. M. Aggarwal40, Z. Ahammed25, J. Amonett15, B. D. Anderson15, M. Anderson5, D. Arkhipkin11, G. S. Averichev10, S. K. Badyal41, J. Balewski13, O. Barannikova25,10, L. S. Barnby15, J. Baudot14, S. Bekele22, V. V. Belaga10, R. Bellwied37, J. Berger12, B. I. Bezverkhny39, S. Bhardwaj42, P. Bhaskar34, A. K. Bhati40, H. Bichsel36, A. Billmeier37, L. C. Bland2, C. O. Blyth3, B. E. Bonner26, M. Botje21, A. Boucham30, A. Brandin19, A. Bravar2, R. V. Cadman1, X. Z. Cai29, H. Caines39, M. Calderón de la Barca Sánchez2, A. Cardenas25, J. Carroll16, J. Castillo16, M. Castro37, D. Cebra5, P. Chaloupka9, S. Chattopadhyay34, H. F. Chen28, Y. Chen6, S. P. Chernenko10, M. Cherney8, A. Chikanian39, B. Choi32, W. Christie2, J. P. Coffin14, T. M. Cormier37, J. G. Cramer36, H. J. Crawford4, D. Das34, S. Das34, A. A. Derevschikov24, L. Didenko2, T. Dietel12, X. Dong28,16, J. E. Draper5, F. Du39, A. K. Dubey43, V. B. Dunin10, J. C. Dunlop2, M. R. Dutta Mazumdar34, V. Eckardt17, L. G. Efimov10, V. Emelianov19, J. Engelage4, G. Eppley26, B. Erazmus30, P. Fachini2, V. Faine2, J. Faivre14, R. Fatemi13, K. Filimonov16, P. Filip9, E. Finch39, Y. Fisyak2, D. Flierl12, K. J. Foley2, J. Fu16,38, C. A. Gagliardi31, M. S. Ganti34, T. D. Gutierrez5, N. Gagunashvili10, J. Gans39, L. Gaudichet30, M. Germain14, F. Geurts26, V. Ghazikhanian6, P. Ghosh34, J. E. Gonzalez6, O. Grachov37, V. Grigoriev19, D. Grosnick33, M. Guedon14, S. M. Guertin6, A. Gupta41, E. Gushin19, T. J. Hallman2, D. Hardtke16, J. W. Harris39, M. Heinz39, T. W. Henry31, S. Heppelmann23, T. Herston25, B. Hippolyte39, A. Hirsch25, E. Hjort16, G. W. Hoffmann32, M. Horsley39, H. Z. Huang6, S. L. Huang28, T. J. Humanic22, G. Igo6, A. Ishihara32, P. Jacobs16, W. W. Jacobs13, M. Janik35, I. Johnson16, P. G. Jones3, E. G. Judd4, S. Kabana39, M. Kaneta16, M. Kaplan7, D. Keane15, J. Kiryluk6, A. Kisiel35, J. Klay16, S. R. Klein16, A. Klyachko13, D. D. Koetke33, T. Kollegger12, A. S. Konstantinov24, M. Kopytine15, L. Kotchenda19, A. D. Kovalenko10, M. Kramer20, P. Kravtsov19, K. Krueger1, C. Kuhn14, A. I. Kulikov10, A. Kumar40, G. J. Kunde39, C. L. Kunz7, R. Kh. Kutuev11, A. A. Kuznetsov10, M. A. C. Lamont3, J. M. Landgraf2, S. Lange12, C. P. Lansdell32, B. Lasiuk39, F. Laue2, J. Lauret2, A. Lebedev2, R. Lednický10, V. M. Leontiev24, M. J. LeVine2, C. Li28, Q. Li37, S. J. Lindenbaum20, M. A. Lisa22, F. Liu38, L. Liu38, Z. Liu38, Q. J. Liu36, T. Ljubicic2, W. J. Llope26, H. Long6, R. S. Longacre2, M. Lopez-Noriega22, W. A. Love2, T. Ludlam2, D. Lynn2, J. Ma6, Y. G. Ma29, D. Magestro22, S. Mahajan41, L. K. Mangotra41, A. P. Mahapatra43, R. Majka39, R. Manweiler33, S. Margetis15, C. Markert39, L. Martin30, J. Marx16, H. S. Matis16, Yu. A. Matulenko24, T. S. McShane8, F. Meissner16, Yu. Melnick24, A. Meschanin24, M. Messer2, M. L. Miller39, Z. Milosevich7, N. G. Minaev24, C. Mironov15, D. Mishra43, J. Mitchell26, B. Mohanty34, L. Molnar25, C. F. Moore32, M. J. Mora-Corral17, V. Morozov16, M. M. de Moura37, M. G. Munhoz27, B. K. Nandi34, S. K. Nayak41, T. K. Nayak34, J. M. Nelson3, P. Nevski2, V. A. Nikitin11, L. V. Nogach24, B. Norman15, S. B. Nurushev24, G. Odyniec16, A. Ogawa2, V. Okorokov19, M. Oldenburg16, D. Olson16, G. Paic22, S. U. Pandey37, S. Pal34, Y. Panebratsev10, S. Y. Panitkin2, A. I. Pavlinov37, T. Pawlak35, V. Perevoztchikov2, W. Peryt35, V. A. Petrov11, S. C. Phatak43, R. Picha5, J. Pluta35, N. Porile25, J. Porter2, A. M. Poskanzer16, M. Potekhin2, E. Potrebenikova10, B. V. K. S. Potukuchi41, D. Prindle36, C. Pruneau37, J. Putschke17, G. Rai16, G. Rakness13, R. Raniwala42, S. Raniwala42, O. Ravel30, R. L. Ray32, S. V. Razin10,13, D. Reichhold25, J. G. Reid36, G. Renault30, F. Retiere16, A. Ridiger19, H. G. Ritter16, J. B. Roberts26, O. V. Rogachevski10, J. L. Romero5, A. Rose37, C. Roy30, L. J. Ruan28,2, V. Rykov37, R. Sahoo43, I. Sakrejda16, S. Salur39, J. Sandweiss39, I. Savin11, J. Schambach32, R. P. Scharenberg25, N. Schmitz17, L. S. Schroeder16, K. Schweda16, J. Seger8, D. Seliverstov19, P. Seyboth17, E. Shahaliev10, M. Shao28, M. Sharma40, K. E. Shestermanov24, S. S. Shimanskii10, R. N. Singaraju34, F. Simon17, G. Skoro10, N. Smirnov39, R. Snellings21, G. Sood40, P. Sorensen6, J. Sowinski13, H. M. Spinka1, B. Srivastava25, S. Stanislaus33, E. J. Stephenson13, R. Stock12, A. Stolpovsky37, M. Strikhanov19, B. Stringfellow25, C. Struck12, A. A. P. Suaide37, E. Sugarbaker22, C. Suire2, M. Šumbera9, B. Surrow2, T. J. M. Symons19, A. Szanto de Toledo27, P. Szarwas35, A. Tai6, J. Takahashi27, A. H. Tang2,21, P. Sorensen44, D. Thein6, J. H. Thomas16, V. Tikhomirov19, M. Tokarev10, M. B. Tonjes18, T. A. Trainor36, S. Trentalange6, R. E. Tribble31, M. D. Trivedi34, V. Trofimov19, O. Tsai6, T. Ullrich2, D. G. Underwood1, G. Van Buren2, A. M. Vander Molen18, A. N. Vasiliev24, M. Vasiliev31, S. E. Vigdor13, Y. P. Viyogi34, S. A. Voloshin37, F. Wang25, G. Wang15, X. L. Wang28, Z. M. Wang28, H. Ward32, J. W. Watson15, R. Wells22, G. D. Westfall18, C. Whitten, Jr.6, H. Wieman16, R. Willson22, S. W. Wissink13, R. Witt39, J. Wood6, J. Wu28, N. Xu16, Z. Xu2, Z. Z. Xu28, A. E. Yakutin24, E. Yamamoto16, J. Yang6, P. Yepes26, V. I. Yurevich10, Y. V. Zanevski10, I. Zborovský9, H. Zhang39,2, H. Y. Zhang15, W. M. Zhang15, Z. P. Zhang28, P. A. Żołnierczuk13, R. Zoulkarneev11, J. Zoulkarneeva11, and A. N. Zubarev10 (STAR Collaboration)
1Argonne National Laboratory, Argonne, Illinois 60439, USA
2Brookhaven National Laboratory, Upton, New York 11973, USA
3University of Birmingham, Birmingham, United Kingdom
4University of California, Berkeley, California 94720, USA
5University of California, Davis, California 95616, USA
6University of California, Los Angeles, California 90095, USA
7Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
8Creighton University, Omaha, Nebraska 68178, USA
9Nuclear Physics Institute AS CR, Řež/Prague, Czech Republic
10Laboratory for High Energy, JINR, Dubna, Russia
11Particle Physics Laboratory, JINR, Dubna, Russia
12University of Frankfurt, Frankfurt, Germany
13Indiana University, Bloomington, Indiana 47408, USA
14Institut de Recherches Subatomiques, Strasbourg, France
15Kent State University, Kent, Ohio 44242, USA
16Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
17Max-Planck-Institut fuer Physik, Munich, Germany
18Michigan State University, East Lansing, Michigan 48824, USA
19Moscow Engineering Physics Institute, Moscow, Russia
20City College of New York, New York City, New York 10031, USA
21NIKHEF, Amsterdam, The Netherlands
22Ohio State University, Columbus, Ohio 43210, USA
23Pennsylvania State University, University Park, Pennsylvania 16802, USA
24Institute of High Energy Physics, Protvino, Russia
25Purdue University, West Lafayette, Indiana 47907, USA
26Rice University, Houston, Texas 77251, USA
27Universidade de Sao Paulo, Sao Paulo, Brazil
28University of Science & Technology of China, Anhui 230027, People’s Republic of China
29Shanghai Institute of Nuclear Research, Shanghai 201800, People’s Republic of China
30SUBATECH, Nantes, France
31Texas A & M, College Station, Texas 77843, USA
32University of Texas, Austin, Texas 78712, USA
33Valparaiso University, Valparaiso, Indiana 46383, USA
34Variable Energy Cyclotron Centre, Kolkata 700064, India
35Warsaw University of Technology, Warsaw, Poland
36University of Washington, Seattle, Washington 98195, USA
37Wayne State University, Detroit, Michigan 48201, USA
38Institute of Particle Physics, CCNU (HZNU), Wuhan 430079, People’s Republic of China
39Yale University, New Haven, Connecticut 06520, USA
40Panjab University, Chandigarh, 160014, India
41University of Jammu, Jammu, 180001, India
42University of Rajasthan, Jaipur, 302004, India
43Insitute of Physics, Bhubaneswar, 751005, India
44University of California, Los Angeles, California 90095, USA
Received 19 June 2003; published 7 October 2004
We report on the rapidity and centrality dependence of proton and antiproton transverse mass distributions from 197Au+197Au collisions at √sNN=130 GeV as measured by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). Our results are from the rapidity and transverse momentum range of ∣y∣<0.5 and 0.35<pt<1.00 GeV∕c. For both protons and antiprotons, transverse mass distributions become more convex from peripheral to central collisions demonstrating characteristics of collective expansion. The measured rapidity distributions and the mean transverse momenta versus rapidity are flat within ∣y∣<0.5. Comparisons of our data with results from model calculations indicate that in order to obtain a consistent picture of the proton (antiproton) yields and transverse mass distributions the possibility of prehadronic collective expansion may have to be taken into account.
© 2004 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.70.041901
DOI:
10.1103/PhysRevC.70.041901
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