Thermodynamics and higher order moments in SU(3) linear sigma-model with gluonic quasiparticles

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Date

2015

Journal Title

Journal ISSN

Volume Title

Type

Article

Publisher

IOP PUBLISHING LTD

Series Info

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS;Volume: 42 Issue: 1

Abstract

In the framework of the linear sigma-model (LSM) with three quark flavors, the chiral phase diagram at finite temperature and density is investigated. For temperatures higher than the critical temperature (T-c), we added to the LSM the gluonic sector from the quasi-particle model (QPM), which assumes that the interacting gluons in the strongly interacting matter, the quark-gluon plasma (QGP), are phenomenologically the same as non-interacting massive quasi-particles. The dependence of the chiral condensates of strange and non-strange quarks on the temperature and chemical potential is analyzed. Then, we calculate the thermodynamics in the new approach (using a combination of the LSM and the QPM). Confronting the results with those from recent lattice quantum chromodynamics simulations reveals an excellent agreement for almost all thermodynamic quantities. The dependences of the first-order and second-order moments of the particle multiplicity on the chemical potential at fixed temperature are studied. These investigations are implemented through characterizing the large fluctuations accompanying the chiral phase transition. The results for the first-order and second-order moments are compared with those from the SU(3) Polyakov linear sigma-model (PLSM). Also, the resulting phase diagrams deduced in the PLSM and the LSM+QPM are compared with each other.

Description

Accession Number: WOS:000348130000005

Keywords

University of chiral lagrangian; quark confinement; quark-gluon plasma; quasiparticle model; QCD; FLUCTUATIONS

Citation

Cited References in Web of Science Core Collection: 37