Superluminal pions in a hadronic fluid
High Energy Physics - Phenomenology
2008-11-26 v2 High Energy Physics - Theory
Nuclear Theory
Abstract
We study the propagation of pions at finite temperature and finite chemical potential in the framework of the linear sigma model with 2 quark flavors and colors. The velocity of massless pions in general differs from that of light. One-loop calculations show that in the chiral symmetry broken phase pions, under certain conditions, propagate faster than light.
Keywords
Cite
@article{arxiv.hep-ph/0301275,
title = {Superluminal pions in a hadronic fluid},
author = {Neven Bilic and Hrvoje Nikolic},
journal= {arXiv preprint arXiv:hep-ph/0301275},
year = {2008}
}
Comments
8 pages, 3 figures included. Considerably revised, discussions expanded, one figure added, typos corrected, results unchanged. To be published in Phys. Rev. D