The linear sigma model at a finite isospin chemical potential
High Energy Physics - Phenomenology
2009-11-11 v2
Abstract
The effect of finite isospin chemical potential to the effective masses of the mesons at finite temperature is investigated in the framework of the O(4) linear sigma model with explicit chiral symmetry breaking. We present a mechanism to include the isospin chemical potential in the model. By using the Cornwall-Jackiw-Tomboulis method of composite operators, we obtain a set gap equations for the effective masses of the mesons and get the numerical results in the Hartree approximation. We find that the introduction of the chemical potential only affects the mass of the charged pions and sigma, while there is almost NO effects on the mass of neutral pions.
Cite
@article{arxiv.hep-ph/0606241,
title = {The linear sigma model at a finite isospin chemical potential},
author = {Hong Mao and Nicholas Petropoulos and Song Shu and Wei-Qin Zhao},
journal= {arXiv preprint arXiv:hep-ph/0606241},
year = {2009}
}
Comments
11 pages, 6 figures; Version to appear in J. Phys. G