Dynamical fluctuations in baryon-meson ratios

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Date

2013

Journal Title

Journal ISSN

Volume Title

Type

Article

Publisher

IOP PUBLISHING

Series Info

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS;Volume: 40 Issue: 5

Abstract

The event-by-event dynamical fluctuations in kaon-proton and proton-pion ratios have been studied as a function of the center-of-mass energies of nucleon-nucleon collisions root s. Based on the changing phase space volume which apparently is the consequence of the phase transition(s) from hadrons to a quark-gluon plasma at large root s, the single-particle distribution function f is assumed to be modified. Varying f and the phase space volume are implemented in the grand-canonical ensemble, especially at root s > 17 GeV, so that the hadron resonance gas model, when taking into account the experimental acceptance A and the quark phase space occupation factor gamma, turns out to be able to reproduce the dynamical fluctuations in (K+ + K-)/(p + (p) over bar) and (p + (p) over bar)/(pi(+) + pi(-)) ratios over the entire range of root s. It seems that the applied thermodynamic statistics could come up with a new modification to the Tsallis statistics. Both non-extensivity and changing the phase space are suggested and utilized in the present work.

Description

Accession Number: WOS:000317466300018

Keywords

University for HEAVY-ION COLLISIONS, HUBBLE PARAMETER, FOKKER-PLANCK, GAS-MODEL, QUARKS, PHASE, QCD, EVENT, UNIVERSE, LATTICE

Citation

Cited References in Web of Science Core Collection: 69