Midrapidity antiproton-to-proton ratio from Au+Au collisions at root s(NN)=130 GeV

Authors
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 Sanchez, MCD 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 Hummler, 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 Kotchendra, 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, MAC 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 Reichhold, SVR 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 Schuttauf, 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, AAP Sugarbaker, E Suire, C Symons, TJM de Toledo, AS 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 Wiemann, 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
Citation
C. Adler et al., Midrapidity antiproton-to-proton ratio from Au+Au collisions at root s(NN)=130 GeV, PHYS REV L, 86(21), 2001, pp. 4778-4782
Citations number
31
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
86
Issue
21
Year of publication
2001
Pages
4778 - 4782
Database
ISI
SICI code
0031-9007(20010521)86:21<4778:MARFAC>2.0.ZU;2-4
Abstract
We report results on the ratio of midrapidity antiproton-to-proton yields i n Au + Au collisions at roots(NN) = 130 GeV per nucleon pair as measured by the STAR experiment at RHIC. Within the rapidity and transverse momentum r ange of /y/ < 0.5 and 0.4 < p(i) < 1.0 GeV/c, the ratio is essentially inde pendent of either transverse momentum or rapidity, with an average of 0.65 <plus/minus> 0.01((stat)) +/- 0.07((syst)) for minimum bias collisions. Wit hin errors, no strong centrality dependence is observed. The results indica te that at this RHIC energy, although the p-(p) over bar pair production be comes important at midrapidity, a significant excess of baryons: over antib aryons is still present.