Pion Superfluidity beyond Mean Field Approximation In Nambu--Jona-Lasinio Model
High Energy Physics - Phenomenology
2009-10-29 v2 Nuclear Theory
Abstract
We investigate pion superfluidity in the frame of two flavor Nambu--Jona-Lasinio model beyond mean field approximation. We calculate the thermodynamics to the next to leading order in an expansion in the inverse number of colors, including both quark and meson contributions at finite temperature and baryon and isospin density. Due to the meson fluctuations, the Sarma phase which exists at mean field level is washed away, and the Bose-Einstein condensation region at low isospin density is highly suppressed.
Keywords
Cite
@article{arxiv.0903.2364,
title = {Pion Superfluidity beyond Mean Field Approximation In Nambu--Jona-Lasinio Model},
author = {Chengfu Mu and Pengfei Zhuang},
journal= {arXiv preprint arXiv:0903.2364},
year = {2009}
}
Comments
7 pages, 4 figures