TY  - JOUR
AU  - Marañon-Gonzalez, F. J.
AU  - Navarro-Salas, J.
PY  - 2023
DA  - 2023//
TI  - Adiabatic regularization for spin-1 fields
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 125001 - 11pp
VL  - 108
IS  - 12
PB  - Amer Physical Soc
AB  - We analyze the adiabatic regularization scheme to renormalize Proca fields in a four-dimensional Friedmann-Lemaitre-Robertson-Walker spacetime. The adiabatic method is well established for scalar and spin-1/2 fields, but is not yet fully understood for spin-1 fields. We give the details of the construction and show that, in the massless limit, the renormalized stress-energy tensor of the Proca field is closely related to that of a minimally coupled scalar field. Our result is in full agreement with other approaches, based on the effective action, which also show a discontinuity in the massless limit. The scalar field can be naturally regarded as a Stueckelberg-type field. We also test the consistency of our results in de Sitter space.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2310.11860
UR  - https://doi.org/10.1103/PhysRevD.108.125001
DO  - 10.1103/PhysRevD.108.125001
LA  - English
N1  - WOS:001121689900014
ID  - Maranon-Gonzalez+Navarro-Salas2023
ER  -