Abstract
We compute the partition function for non-interacting chiral fermions at second order in a derivative expansion of an arbitrary time-independent gravitational and gauge background. We find that Pauli-Villars regularization of the vacuum part is needed to get consistent results. We use our results to discuss some features of the non-dissipative constitutive relations of second order hydrodynamics.
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Megías, E., Valle, M. Second-order partition function of a non-interacting chiral fluid in 3+1 dimensions. J. High Energ. Phys. 2014, 5 (2014). https://doi.org/10.1007/JHEP11(2014)005
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DOI: https://doi.org/10.1007/JHEP11(2014)005