On the Chiral Phase Transition in the Linear Sigma Model
High Energy Physics - Phenomenology
2009-11-10 v1
Abstract
The Cornwall-Jackiw-Tomboulis (CJT) effective action for composite operators at finite temperature is used to investigate the chiral phase transition within the framework of the linear sigma model as the low-energy effective model of quantum chromodynamics (QCD). A new renormalization prescription for the CJT effective action in the Hartree-Fock (HF) approximation is proposed. A numerical study, which incorporates both thermal and quantum effect, shows that in this approximation the phase transition is of first order. However, taking into account the higher-loop diagrams contribution the order of phase transition is unchanged.
Cite
@article{arxiv.hep-ph/0309055,
title = {On the Chiral Phase Transition in the Linear Sigma Model},
author = {Tran Huu Phat and Nguyen Tuan Anh and Le Viet Hoa},
journal= {arXiv preprint arXiv:hep-ph/0309055},
year = {2009}
}
Comments
12 pages, 4 figures