Evaporating Primordial Black Holes in Gamma Ray and Neutrino Telescopes

TL;DR

This paper re-evaluates gamma ray and neutrino signals from evaporating primordial black holes, improving bounds and highlighting neutrino telescopes' potential in detecting these transient events.

Contribution

It provides updated flux estimates, enhances gamma ray bounds, and discusses the unique advantages of neutrino telescopes for primordial black hole detection.

Findings

Gamma ray bounds are improved by a factor of a few.

Neutrino flux results differ significantly from previous studies.

Energy and time correlation profiles are promising identification tools.

Abstract

A primordial black hole in the last stages of evaporation and located in the local neighborhood can produce a detectable signal in gamma ray and neutrino telescopes. We re-evaluate the expected gamma ray and neutrino fluxes from these transient point events and discuss the consequences for existing constraints. For gamma rays we improve the current bounds by a factor of few, while for neutrinos we obtain significantly different results than the existing literature. The capability and advantages of neutrino telescopes in the search for primordial black holes is discussed thoroughly. The correlations of gamma ray and neutrino energy and time profiles will be promoted as a powerful tool in identifying the primordial black holes, in case of detection.