Electron scattering of light new particles from evaporating primordial black holes

TL;DR

This paper explores how primordial black holes emitting light new particles via Hawking radiation can be detected through their interactions with electrons, providing a novel method to probe dark matter candidates beyond traditional cosmological and collider approaches.

Contribution

It extends previous work by analyzing interactions between emitted light particles and electrons, offering new constraints from direct detection and neutrino experiments.

Findings

Primordial black holes can produce detectable light particles.

Interactions with electrons allow constraints from XENON1T and Super-Kamiokande.

New bounds complement cosmological and collider searches.

Abstract

Primordial black holes are a possible component of dark matter, and a most promising way of investigating them is through the product of their Hawking evaporation. As a result of this process, any species lighter than the Hawking temperature is emitted, including possible new particles beyond the Standard Model. These can then be detected in lab-based experiments via their interaction with the Standard Model particles. In a previous work, we have first proposed and studied this scenario in the presence of an interaction between the light new species and nucleons. Here we extend this discussion to include the case of interaction with electrons. We show that the simultaneous presence of primordial black holes and species lighter than about $100$ MeV can be constrained by the measurements of direct detection experiments, such as XENON1T, and water Cherenkov neutrino detectors, such as Super-Kamiokande. Our results provide a complementary and alternative way of investigation with respect to cosmological and collider searches.