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Chiral torsional effects in anomalous fluids in thermal equilibrium

2021; Springer Nature; Volume: 2021; Issue: 5 Linguagem: Inglês

10.1007/jhep05(2021)209

1127-2236

Juan L. Mañes, Manuel Valle, Miguel Angel Vázquez-Mozo,

High-pressure geophysics and materials

A bstract Using the similarity between spacetime torsion and axial gauge couplings, we study torsional contributions to the equilibrium partition function in a stationary background. In the case of a charged fluid minimally coupled to torsion, we spot the existence of linear torsional magnetic and vortical effects, while the axial-vector current and the spin energy potential do not receive corrections in the torsion at linear order. The covariant energy-momentum tensor, on the other hand, does contain terms linear in the torsion tensor. The case of a two-flavor hadronic superfluid is also analyzed, and the torsional contributions to the constitutive relations computed. Our results show the existence of a torsional electric chiral effect mediated by the charged pions.