By using Chiral Perturbation Theory and the Uehling-Uhlenbeck equation we
compute the viscosity of a pion gas, in the low temperature and low density
regime, in terms of the temperature, and the pion fugacity. The viscosity turns
out to be proportional to the squared root of the temperature over the pion
mass. Next to leading corrections are proportional to the temperature over the
pion mass to the 3/2.Comment: 15 pages, 4 figures. RevTeX 

A. Dobado

Antonio Dobado

E. A. Uehling

J. D. Bjorken

J. Gasser

L. D. Landau

M. Prakash

P. Gerber

S. Weinberg

Silvia N. Santalla

English

arXiv

©The American Physical Society.
The authors want to thank A. Gomez Nicola and J. R. Pelaez for reading the manuscript. This work has been partially supported by the Ministerio de Educación y Ciencia (Spain)  (CICYT AEN 97-1693 and PB98-0782).By using chiral perturbation theory and the Uehling-Uhlenbeck equation we compute the viscosity of a pion gas, in the low temperature and low density regime, in terms of the temperature and the pion fugacity. The viscosity turns out to be proportional to the square root of the temperature over the pion mass. Next to leading corrections are proportional to the temperature over the pion mass to 3/2.CICYTMinisterio de Educación y Ciencia (Spain)Depto. de Física TeóricaFac. de Ciencias FísicasTRUEpu

Pion gas viscosity at low temperature and density

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