Chiral vortical effect for vector fields

We consider the photonic vortical effect, i.e., difference of flows left- and right-handed photons along vector angular velocity in rotating medium. Two alternative frameworks to evaluate effect are considered, both which have already been tried literature: first, standard thermal field theory and, alternatively, Hawking-radiation-type derivation. In our earlier attempt compare two approaches, we found a crucial factor 2 difference. Here, revisit problem, paying more attention details infrared regularizations. find out that introduction an infinitesimal mass brings ways evaluating chiral into agreement with each other. Some implications, on theoretical phenomenological sides, mentioned.