Transport coefficients in large N(f) gauge theories with massive fermions
Mar, 200538 pages
Published in:
- JHEP 03 (2005) 074
e-Print:
- hep-ph/0503161 [hep-ph]
Report number:
- SWAT-05-427
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Abstract:
We compute the shear viscosity and the electrical conductivity in gauge theories with massive fermions at leading order in the large N_f expansion. The calculation is organized using the 1/N_f 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.- quantum electrodynamics
- quantum chromodynamics
- fermion: massive
- expansion 1/N: flavor
- symmetry: U(N)
- transport theory
- viscosity
- effective action
- gauge fixing
- Ward identity
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