Transition from Baryonic to Mesonic Freeze-Out

Abstract

The recently discovered sharp peak in the K+/pi+ ratio is discussed in the framework of the statistical model. In this model a rapid change is expected as the hadronic gas undergoes a transition from a baryon-dominated to a meson-dominated gas. The transition happens at sqrt{s_{NN}} = 8.16 GeV, temperature T = 140 MeV and baryon chemical potential mu_B = 410 MeV. The maximum in the Lambda/pi ratio is well reproduced by the statistical model, but the change in the K+/pi+ ratio is much less pronounced than the one observed by the NA49 collaboration. Further experimental tests are proposed to clarify the nature of the transition. In particular, the maxima expected in the statistical model for the Xi/pi and Omega/pi ratios occur at slightly higher beam energies than the maxima for the Lambda/pi and K+/pi+ ratios.

5 pages, 5 postscript figures, uses elsart.sty

References in corpus (19)

• QCD at Finite Baryon Density: Nucleon Droplets and Color Superconductivity
• Lattice determination of the critical point of QCD at finite T and μ
• Energy Dependence of Pion and Kaon Production in Central Pb+Pb Collisions
• Features of particle multiplicities and strangeness production in central heavy ion collisions between 1.7A and 158A GeV/c
• Unified Description of Freeze-Out Parameters in Relativistic Heavy Ion Collisions
• Universality, the QCD critical/tricritical point and the quark number susceptibility
• THERMUS -- A Thermal Model Package for ROOT
• Thermodynamics at Non-Zero Baryon Number Density: A Comparison of Lattice and Hadron Resonance Gas Model Calculations
• Chemical equilibrium study in nucleus-nucleus collisions at relativistic energies
• Maximum Relative Strangeness Content in Heavy Ion Collisions Around 30 A.GeV
• Charged Pion Production in 2 to 8 AGeV Central Au+Au Collisions
• Influence of Impact Parameter on Thermal Description of Relativistic Heavy Ion Collisions at GSI/SIS
• An Excitation Function of K${}^{-}$ and K${}^{+}$ Production in Au+Au Reactions at the AGS
• Report from NA49
• $\Lambda$ and $\bar{\Lambda }$ Production in Central Pb-Pb Collisions at 40, 80, and 158 A$\cdot$GeV
• Centrality Dependence of Kaon Yields in Si+A and Au+Au Collisions at Relativistic Energies
• Cascade and anti-cascade production in central Pb+Pb collisions at 158 GeV/c per nucleon
• Near-threshold production of the multi-strange ${\Xi }^{-}$ hyperon
• Relativistic Nucleus-Nucleus Collisions: from the BEVALAC to RHIC

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