Black hole particle emission in higher-dimensional spacetimes

TL;DR

This paper calculates the emission rates of particles from higher-dimensional black holes, revealing that gravitons dominate the evaporation process as dimensions increase, impacting collider black hole phenomenology.

Contribution

It provides detailed computations of absorption cross-sections and emissivities for all known fields in higher-dimensional black hole evaporation, highlighting the increased graviton emission with more dimensions.

Findings

Graviton emissivity increases with spacetime dimensions.

Black holes lose significant mass in the bulk due to graviton emission.

Results influence black hole detection strategies in particle colliders.

Abstract

In models with extra dimensions, a black hole evaporates both in the bulk and on the visible brane, where standard model fields live. The exact emissivities of each particle species are needed to determine how the black hole decay proceeds. We compute and discuss the absorption cross-sections, the relative emissivities and the total power output of all known fields in the evaporation phase. Graviton emissivity is highly enhanced as the spacetime dimensionality increases. Therefore, a black hole loses a significant fraction of its mass in the bulk. This result has important consequences for the phenomenology of black holes in models with extra dimensions and black hole detection in particle colliders.