Superluminal pions in a hadronic fluid

Details Superluminal pions in a hadronic fluid Superluminal pions in a hadronic fluid

2003-01-31

arxiv.org/abs/hep-ph/0301275v2

Phys.Rev.D68:085008,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 3 figures included. Considerably revised, discussions expanded, one figure added, typos corrected, results unchanged.

Scientific paper

10.1103/PhysRevD.68.085008

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
$N_c$ 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.

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