Exact results for evaporating black holes in curvature-squared Lovelock gravity: Gauss-Bonnet greybody factors

Journal Article · Tue Nov 15 04:00:00 EST 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.104016· OSTI ID:20711569

Grain, J; Barrau, A ^[1]; Kanti, P ^[2]

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1. Laboratory for Subatomic Physics and Cosmology, Joseph Fourier University, CNRS-IN2P3, 53, avenue des Martyres, 38026 Grenoble cedex (France)
2. Department of Mathematical Sciences, University of Durham, Science Site, South Road, Durham DH1 3LE (United Kingdom)

Lovelock gravity is an important extension of general relativity that provides a promising framework to study curvature corrections to the Einstein action, while avoiding ghosts and keeping second order field equations. This paper derives the greybody factors for D-dimensional black holes arising in a theory with a Gauss-Bonnet curvature-squared term. These factors describe the nontrivial coupling between black holes and quantum fields during the evaporation process: they can be used both from a theoretical viewpoint to investigate the intricate space-time structure around such a black hole, and for phenomenological purposes in the framework of braneworld models with a low Planck scale. We derive exact spectra for the emission of scalar, fermion and gauge fields emitted on the brane, and for scalar fields emitted in the bulk, and demonstrate how the Gauss-Bonnet term can change the bulk-to-brane emission rates ratio in favor of the bulk channel in particular frequency regimes.

• OSTI ID: 20711569
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 10 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BLACK HOLES
CORRECTIONS
COUPLING
EMISSION SPECTRA
FERMIONS
FIELD EQUATIONS
GAUGE INVARIANCE
GENERAL RELATIVITY THEORY
GRAVITATION
QUANTUM GRAVITY
SCALAR FIELDS
SPACE-TIME