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• W2892244850 abstract "We investigate the Becchi-Rouet-Stora-Tyutin (BRST) formalism for gauge theories on spherically symmetric black hole spacetimes, with or without a cosmological constant ($Lambdageq0$). This is illustrated through the example of scalar electrodynamics. We first demonstrate that the horizons contribute additional surface terms to the Gauss law constraint of the theory when gauge transformations are not required to vanish on the horizons. We then consider the BRST invariant path integral including these surface terms following the Hamiltonian BRST formalism. We fix a radiation-like gauge which involves null components of the electromagnetic field at the horizons. We find that the presence of the surface terms in the constraint forces the ghost and gauge fixing actions to include additional surface integrals at the horizons. The null combination of the gauge fields at the horizons is shown to modify the ghost number charge of the theory through additional terms at the horizons. We also demonstrate how one can construct a gauge-fixing fermion which generates its own nilpotent symmetry transformations, called co-BRST transformations, that leave the theory invariant. The BRST and co-BRST transformations are further used to identify dressed (gauge invariant) fields of theory, whose dressings are affected by the presence of Killing horizons. We conclude with a discussion of potential applications of our results in soft limits and thermal field theories on black hole backgrounds." @default.
• W2892244850 created "2018-09-27" @default.
• W2892244850 creator A5018905660 @default.
• W2892244850 creator A5068569818 @default.
• W2892244850 date "2019-04-09" @default.
• W2892244850 modified "2023-10-18" @default.
• W2892244850 title "Hamiltonian BRST formalism for gauge fields on black hole spacetimes" @default.
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• W2892244850 doi "https://doi.org/10.1103/physrevd.99.085004" @default.
• W2892244850 hasPublicationYear "2019" @default.
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