Rapidity Dependence of Charged Antiparticle-to-Particle Ratios in Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV

Abstract

We present ratios of the numbers of charged antiparticles to particles (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 particle ratios at midrapidity are approaching unity, the $K^{-}/K^{+}$ and $\bar{p}/p$ ratios decrease significantly at forward rapidities. An interpretation of the results within the statistical model indicates a reduction of the baryon chemical potential from ${\mu }_B\approx 130$MeV at $y$=3 to ${\mu }_B\approx 25$MeV at $y$=0.

arXiv comment4 pages, 4 figures

References in corpus (14)

• Hadron production in Au-Au collisions at RHIC
• Features of particle multiplicities and strangeness production in central heavy ion collisions between 1.7A and 158A GeV/c
• Thermal Hadron Production in High Energy Heavy Ion Collisions
• Pseudorapidity distributions of charged particles from Au+Au collisions at the maximum RHIC energy, Sqrt(s_NN) = 200 GeV
• Mid-rapidity $\Lambda$ and $\bar{\Lambda }$ Production in Au+Au Collisions at $\sqrt{s_{{}_{NN}}}=130$ GeV
• Colour Deconfinement in Nuclear Collisions
• Charged particle densities from Au+Au collisions at sqrt{s_{NN}}=130 GeV
• Mid-rapidity anti-proton to proton ratio from Au+Au collisions at $\sqrt{s_{NN}}=130$ GeV
• Energy dependence of particle multiplicities in central Au+Au collisions
• Measurement of the lambda and lambda^bar particles in Au+Au Collisions at sqrt(s_NN)=130 GeV
• Centrality Dependence of Kaon Yields in Si+A and Au+Au Collisions at Relativistic Energies
• Rapidity dependence of antiproton to proton ratios in Au+Au collisions at sqrt{s_{NN}}=130 GeV
• Ratios of charged antiparticles to particles near mid-rapidity in Au+Au collisions at sqrt(s_NN) = 130 GeV
• Overview of PHENIX Results from the First RHIC Run

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