Transport Coefficients in Quasi-particle Models

Autor:	Bashir, Waseem, Uddin, Saeed, Ahmad, Jan Shabir
Rok vydání:	2012
Předmět:	High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
Popis:	We study the non-equilibrium properties of a dynamical fluid composed of quasi-particles whose mass is temperature and charge chemical potential dependent, in kinetic theory under the relaxation time approximation. In particular we calculate the scaling behaviour of bulk viscosity `$\zeta$' near the QCD chiral phase transition in the 3d $\it O$(2) universality class. It is found that the bulk viscosity `$\zeta$' does not show a divergent behaviour near the QCD chiral phase transition. This scaling behaviour of `$\zeta$' prevails in the presence of Gold-stone modes that arise due to the explicit breaking of continuous $\it O$(4) symmetry. On contrary these modes have a significant effect on the scaling behaviour of specific heat $C_V$ which diverges at the critical temperature $T_C$. Comment: 21 pages
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1210.7990 Zobrazit plný text záznamu View this record from Arxiv