T-μ phase diagram of the chiral quark model from a large flavor number expansion

被引：35

作者：

Jakovác, A

Patkós, A

Szép, Z

Szépfalusy, P

机构：

[1] Hungarian Acad Sci, H-1521 Budapest, Hungary

[2] Budapest Univ Technol & Econ, Res Grp Theory Condensed Matter, H-1521 Budapest, Hungary

[3] Eotvos Lorand Univ, Dept Atom Phys, H-1117 Budapest, Hungary

[4] Eotvos Lorand Univ, Dept Phys Complex Syst, H-1117 Budapest, Hungary

[5] Hungarian Acad Sci, Res Grp Stat Phys, H-1117 Budapest, Hungary

[6] Hungarian Acad Sci, Res Inst Solid State Phys & Opt, H-1525 Budapest, Hungary

来源：

PHYSICS LETTERS B | 2004年 / 582卷 / 3-4期

基金：

匈牙利科学研究基金会;

关键词：

large N approximation; tricritical point; finite density;

D O I：

10.1016/j.physletb.2004.01.008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The chiral phase boundary of strong matter is determined in the T-A plane from the chiral quark model, applying a non-perturbatively renormalised treatment, involving chains of pion-bubbles and I-loop fermion contributions. In the absence of explicit symmetry breaking the second order portion of the phase boundary and the location of the tricritical point (TCP) are determined analytically. Sensitivity of the results to the renormalisation scale is carefully investigated. The softening of the sigma-pole near the second order transitions is confirmed. (C) 2004 Published by Elsevier B.V.

引用

页码：179 / 186

页数：8

共 27 条

[1] QCD thermal phase transition in the presence of a small chemical potential [J].