Bearden IG, Beavis D, Besliu C, Blyakhman Y, Budick B, Bøggild H, Chasman C, Christensen CH, Christiansen P, Cibor J, Debbe R, Enger E, Gaardhøje JJ, Germinario M, Hagel K, Hansen O, Holm A, Holme AK, Ito H, Jakobsen E, Jipa A, Jundt F, Jørdre JI, Jørgensen CE, Karabowicz R, Keutgen T, Kim EJ, Kozik T, Larsen TM, Lee JH, Lee YK, Løvhøiden G, Majka Z, Makeev A, McBreen B, Mikelsen M, Murray M, Natowitz J, Nielsen BS, Norris J, Olchanski K, Olness J, Ouerdane D, Płaneta R, Rami F, Ristea C, Röhrich D, Samset BH, Sandberg D, Sanders SJ, Scheetz RA, Staszel P, Tveter TS, Videbaek F, Wada R, Wieloch A, Yin Z, Zgura IS. Rapidity dependence of charged antihadron to hadron ratios in Au+Au collisions at sqrt[s(NN)]=200 GeV.
PHYSICAL REVIEW LETTERS 2003;
90:102301. [PMID:
12688991 DOI:
10.1103/physrevlett.90.102301]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2002] [Indexed: 05/24/2023]
Abstract
We present ratios of the numbers of charged antihadrons to hadrons (pions, kaons, and protons) in Au+Au collisions at sqrt[s(NN)]=200 GeV as a function of rapidity in the range y=0-3. While the ratios at midrapidity are approaching unity, the K(-)/K(+) and p;/p ratios decrease significantly at forward rapidities. An interpretation of the results within the statistical model indicates a reduction of the baryon chemical potential from mu(B) approximately 130 MeV at y=3 to mu(B) approximately 25 MeV at y=0.
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