在质心能量平方根√[s(NN)] = 130 GeV下金离子与金离子碰撞产生的中快度反质子与质子比率
Midrapidity antiproton-to-proton ratio from Au+Au collisions at sqrt [s(NN)]=130 GeV.
作者信息
Adler C, Ahammed Z, Allgower C, Anderson M, Averichev G S, Balewski J, Barannikova O, Barnby L S, Baudot J, Bekele S, Belaga V V, Bellwied R, Berger J, Bichsel H, Bland L C, Blyth C O, Bonner B E, Bossingham R, Boucham A, Brandin A, Caines H, de la Barca Sánchez M C, Cardenas A, Carroll J, Castillo J, Castro M, Cebra D, Chattopadhyay S, Chen M L, Chen Y, Chernenko S P, Cherney M, Chikanian A, Choi B, Christie W, Coffin J P, Conin L, Cormier T M, Cramer J G, Crawford H J, DeMello M, Deng W S, Derevschikov A A, Didenko L, Draper J E, Dunin V B, Dunlop J C, Eckardt V, Efimov L G, Emelianov V, Engelage J, Eppley G, Erazmus B, Fachini P, Ferguson M I, Finch E, Fisyak Y, Flierl D, Foley K J, Gagunashvili N, Gans J, Germain M, Geurts F, Ghazikhanian V, Grabski J, Grachov O, Greiner D, Grigoriev V, Gushin E, Hallman T J, Hardtke D, Harris J W, Heffner M, Heppelmann S, Herston T, Hippolyte B, Hirsch A, Hjort E, Hoffmann G W, Horsley M, Huang H Z, Humanic T J, Hümmler H, Igo G J, Ishihara A, Ivanshin Y I, Jacobs P, Jacobs W W, Janik M, Johnson I, Jones P G, Judd E, Kaneta M, Kaplan M, Keane D, Khodinov A, Kisiel A, Klay J, Klein S R, Klyachko A, Konstantinov A S, Kotchenda L, Kovalenko A D, Kramer M, Kravtsov P, Krueger K, Kuhn C, Kulikov A I, Kunde G J, Kunz C L, Kutuev R K, Kuznetsov A A, Lamas-Valverde J, Lamont M A, Landgraf J M, Lange S, Lansdell C P, Lasiuk B, Laue F, Lebedev A, LeCompte T, Leontiev V M, Leszczynski P, LeVine M J, Li Q, Li Q, Lindenbaum S J, Lisa M A, Ljubicic T, Llope W J, LoCurto G, Long H, Longacre R S, Lopez-Noriega M, Love W A, Lynn D, Madansky L, Majka R, Maliszewski A, Margetis S, Martin L, Marx J, Matis H S, Matulenko Y A, McShane T S, Melnick Y, Meschanin A, Milosevich Z, Minaev N G, Mitchell J, Moiseenko V A, Moltz D, Moore C F, Morozov V, de Moura M M, Munhoz M G, Mutchler G S, Nelson J M, Nevski P, Nikitin V A, Nogach L V, Norman B, Nurushev S B, Nystrand J, Odyniec G, Ogawa A, Ogilvie C A, Oldenburg M, Olson D, Paic G, Pandey S U, Panebratsev Y, Panitkin S Y, Pavlinov A I, Pawlak T, Perevoztchikov V, Peryt W, Petrov V A, Pinganaud W, Platner E, Pluta J, Porile N, Porter J, Poskanzer A M, Potrebenikova E, Prindle D, Pruneau C, Radomski S, Rai G, Ravel O, Ray R L, Razin S V, Reichhold D, Reid J, Retiere F, Ridiger A, Ritter H G, Roberts J B, Rogachevski O V, Roy C, Russ D, Rykov V, Sakrejda I, Sandweiss J, Saulys A C, Savin I, Schambach J, Scharenberg R P, Schmitz N, Schroeder L S, Schüttauf A, Seger J, Seliverstov D, Seyboth P, Shestermanov K E, Shimanskii S S, Shvetcov V S, Skoro G, Smirnov N, Snellings R, Sowinski J, Spinka H M, Srivastava B, Stephenson E J, Stock R, Stolpovsky A, Strikhanov M, Stringfellow B, Stroebele H, Struck C, Suaide A A, Sugarbaker E, Suire C, Symons T J, Szanto de Toledo A, Szarwas P, Takahashi J, Tang A H, Thomas J H, Tikhomirov V, Trainor T, Trentalange S, Tokarev M, Tonjes M B, Trofimov V, Tsai O, Turner K, Ullrich T, Underwood D G, Van Buren G, VanderMolen A M, Vanyashin A, Vasilevski I M, Vasiliev A N, Vigdor S E, Voloshin S A, Wang F, Ward H, Wells R, Wenaus T, Westfall G D, Whitten C, Wieman H, Willson R, Wissink S W, Witt R, Xu N, Xu Z, Yakutin A E, Yamamoto E, Yang J, Yepes P, Yokosawa A, Yurevich V I, Zanevski Y V, Zhang J, Zhang W M, Zoulkarneev R, Zubarev A N
机构信息
University of Frankfurt, Frankfurt, Germany.
出版信息
Phys Rev Lett. 2001 May 21;86(21):4778-82. doi: 10.1103/PhysRevLett.86.4778.
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.
我们报告了相对论重离子对撞机（RHIC）上的STAR实验所测量的在每核子对质心能量√[s(NN)] = 130 GeV的金金碰撞中，快度中间区域反质子与质子产额之比的结果。在快度范围|y|<0.5和横向动量范围0.4<p(t)<1.0 GeV/c内，该比值基本与横向动量或快度无关，对于最小无偏碰撞，其平均值为0.65±0.01（统计误差）±0.07（系统误差）。在误差范围内，未观察到强烈的中心度依赖性。结果表明，在这个RHIC能量下，尽管在快度中间区域质子 - 质子对产生变得重要，但重子相对于反重子仍存在显著过量。
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