Brane Decay of a (4+n)-Dimensional Rotating Black Hole. II: spin-1 particles

TL;DR

This paper investigates the emission of spin-1 gauge fields from a higher-dimensional rotating black hole on the brane, analyzing emission rates, angular distributions, and superradiance effects, which could serve as signatures of Hawking radiation in brane-world scenarios.

Contribution

It extends previous work on scalar emissions by analyzing gauge field emissions, providing a comprehensive study of their characteristics for various black hole spins and dimensions.

Findings

Distinct emission rate behaviors for spin-1 fields.

Angular distribution patterns of emitted particles and energy.

Enhanced emission and superradiance effects compared to scalar fields.

Abstract

The present works complements and expands a previous one, focused on the emission of scalar fields by a (4+n)-dimensional rotating black hole on the brane, by studying the emission of gauge fields on the brane from a similar black hole. A comprehensive analysis of the particle, energy and angular momentum emission rates is undertaken, for arbitrary angular momentum of the black hole and dimensionality of spacetime. Our analysis reveals the existence of a number of distinct features associated with the emission of spin-1 fields from a rotating black hole on the brane, such as the behaviour and magnitude of the different emission rates, the angular distribution of particles and energy, the relative enhancement compared to the scalar fields, and the magnitude of the superradiance effect. Apart from their theoretical interest, these features can comprise clear signatures of the emission of Hawking radiation from a brane-world black hole during its spin-down phase upon successful detection of this effect during an experiment.