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Transport coefficients in large Nf gauge theories with massive fermions

Gert Aarts1,2 and Jose M. Martínez Resco3,4

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We compute the shear viscosity and the electrical conductivity in gauge theories with massive fermions at leading order in the large Nf expansion. The calculation is organized using the 1/Nf expansion of the 2PI effective action to next-to-leading order. We show explicitly that the calculation is gauge fixing independent and consistent with the Ward identity. We find that these transport coefficients depend in a nontrivial manner on the coupling constant and fermion mass. For large mass, both the shear viscosity and the electrical conductivity go to zero.

Keywords

1/N Expansion

Thermal Field Theory

 

E-print Number: hep-ph/0503161

Cited: by |

Refers: to

PACS

11.15.Pg Expansions for large numbers of components (e.g., 1/Nc expansions)

Subjects

Particle physics and field theory

Dates

Issue 03 (March 2005)

Received 17 March 2005, accepted for publication 28 March 2005

Published 18 April 2005



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