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Phys. Rev. Lett. 90, 102301 (2003) [4 pages]

Rapidity Dependence of Charged Antihadron to Hadron Ratios in Au+Au Collisions at sqrt[sNN]=200  GeV
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I. G. Bearden et al. BRAHMS Collaboration
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Received 12 July 2002; published 12 March 2003

We present ratios of the numbers of charged antihadrons to hadrons (pions, kaons, and protons) in Au+Au collisions at sqrt[sNN]=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 p̅ /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 μB≈130   MeV at y=3 to μB≈25   MeV at y=0.


©2003 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v90/e102301
DOI: 10.1103/PhysRevLett.90.102301
PACS: 25.75.Dw

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