Rapidity dependence of charged antihadron to hadron ratios in Au+Au collisions at sqrt[s(NN)]=200 GeV |
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| Authors: | Bearden I G,Beavis D,Besliu C,Blyakhman Y,Budick B,Bøggild H,Chasman C,Christensen C H,Christiansen P,Cibor J,Debbe R,Enger E,Gaardhøje J J,Germinario M,Hagel K,Hansen O,Holm A,Holme A K,Ito H,Jakobsen E,Jipa A,Jundt F,Jørdre J I,Jørgensen C E,Karabowicz R,Keutgen T,Kim E J,Kozik T,Larsen T M,Lee J H,Lee Y K,Løvhøiden G,Majka Z,Makeev A,McBreen B,Mikelsen M,Murray M,Natowitz J,Nielsen B S,Norris J,Olchanski K,Olness J,Ouerdane D,Płaneta R,Rami F,Ristea C,Röhrich D,Samset B H,Sandberg D,Sanders S J,Scheetz R A,Staszel P,Tveter T S,Videbaek F,Wada R,Wieloch A,Yin Z,Zgura I S BRAHMS Collaboration |
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| Affiliation: | Niels Bohr Institute, Blegdamsvej 17, University of Copenhagen, Copenhagen 2100, Denmark. |
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| 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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