%0 Journal Article
%T Adiabatic regularization for spin-1 fields
%A Marañon-Gonzalez, F. J.
%A Navarro-Salas, J.
%J Physical Review D
%D 2023
%V 108
%N 12
%I Amer Physical Soc
%@ 2470-0010
%G English
%F Maranon-Gonzalez+Navarro-Salas2023
%O WOS:001121689900014
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5871), last updated on Fri, 12 Jan 2024 16:52:41 +0000
%X 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.
%R 10.1103/PhysRevD.108.125001
%U https://arxiv.org/abs/2310.11860
%U https://doi.org/10.1103/PhysRevD.108.125001
%P 125001 - 11pp