On the Physics of a Cool Pion Gas

Details On the Physics of a Cool Pion Gas On the Physics of a Cool Pion Gas

1996-09-19

arxiv.org/abs/hep-ph/9609414v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 1 figure. Talk given at the "Rhic Summer Studies '96", Brookhaven National Laboratory, Upton, USA. July 96

Scientific paper

At finite temperature, the Nambu-Goldstone bosons of a spontaneously broken
chiral symmetry travel at a velocity $v < 1$. This effect first appears at
order $\sim T^4$ in an expansion about low temperature, and can be related to
the appearence of two distinct pion decay constants in a thermal bath. We
discuss some consequences on the thermodynamics of a gas of massless pions.

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