Ladder-QCD at finite isospin chemical potential

被引：54

作者：

Barducci, A

Pettini, G

Ravagli, L

Casalbuoni, R

机构：

[1] Univ Florence, Dept Phys, I-50109 Florence, Italy

[2] Ist Nazl Fis Nucl, Sez Firenze, I-50109 Florence, Italy

[3] CERN, Div TH, CH-1211 Geneva, Switzerland

来源：

PHYSICS LETTERS B | 2003年 / 564卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(03)00705-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use an effective QCD model (ladder-QCD) to explore the phase diagram for chiral symmetry breaking and restoration at finite temperature with different u, d quark chemical potentials. In agreement with a recent investigation based on the Nambu-Jona-Lasinio model, we find that a finite pion condensate shows up for high enough isospin chemical potential mu(I) = (mu(u) - mu(d))/2. For small mu(I) the phase diagram in the (mu(B), T) plane shows two first order transition lines and two critical ending points. (C) 2003 Published by Elsevier B.V.

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页码：217 / 224

页数：8

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