Phase Space and Dynamical Fluctuations of Kaon-to-Pion Ratios

Abstract

Abstract The dynamical fluctuations of kaon-to-pion ratios have been studied over a wide range of center-of-mass energies √s. On the basis of changing phase space volume which apparently is the consequence of phase transition from hadrons to quark-gluon plasma at large √s, the single-particle distribution function f is assumed to be rather modified. Varying f and phase space volume are implemented in the grand-canonical partition function, especially at large √s, so that the hadron resonance gas model, when taking into account the experimental acceptance and quark phase space occupation factor, turns to be able to reproduce the dynamical fluctuations of kaon-to-pion ratios over the entire range of √s.