期刊
PHYSICAL REVIEW LETTERS
卷 90, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.90.102301
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We present ratios of the numbers of charged antihadrons to hadrons (pions, kaons, and protons) in Au + Au collisions at roots(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) over bar /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) approximate to 130 MeV at y = 3 to mu(B) approximate to 25 MeV at y = 0.
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