Dynamics of chemical equilibrium of hadronic matter close to Tc

J. Noronha-Hostler, M. Beitel, C. Greiner, Igor Shovkovy

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

Quick chemical equilibration times of hadrons (specifically, pp, KK, ΛΛ, and ΩΩ pairs) within a hadron gas are explained dynamically using Hagedorn states, which drive particles into equilibrium close to the critical temperature. Within this scheme, we use master equations and derive various analytical estimates for the chemical equilibration times. We compare our model to recent lattice results and find that for both Tc=176 MeV and Tc=196 MeV, the hadrons can reach chemical equilibrium almost immediately, well before the chemical freeze-out temperatures found in thermal fits for a hadron gas without Hagedorn states. Furthermore, the ratios p/π, K/π, Λ/π, and Ω/π match experimental values well in our dynamical scenario.

Original languageEnglish (US)
Article number054909
JournalPhysical Review C - Nuclear Physics
Volume81
Issue number5
DOIs
StatePublished - May 28 2010

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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