Prospects for the observation of Primordial Black Hole evaporation with the Southern Wide field of view Gamma-ray Observatory

Primordial Black Holes (PBHs) are remnants of objects formed in the early Universe. Their lifetime is an increasing function of their mass, so PBHs in the right mass range can end their lives in an evaporation event that is potentially detectable by our instruments now. This evaporation may result in a -ray flash that can be detected by the current generation of Very-High-Energy -ray detectors. The Southern Wide field of view Gamma-ray Observatory (SWGO) will be part of the next generation of these instruments. It will be able to establish limits on PBH evaporations for integration windows between 0.5 and 5 s, in a radius of 0.25 pc around the Earth, being sensitive to a rate of the order of ∼ 50 pc-3 yr-1, more than one order of magnitude more constraining than the currently established best limits. © 2021 IOP Publishing Ltd and Sissa Medialab.This work was financially supported by the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 754496 -FELLINI. R.L.-C. acknowledges the financial support from the State Agency for Research of the Spanish MCIU through the `Center of Excellence Severo Ochoa' award to the Instituto de Astrofisica de Andalucia (SEV-2017-0709). MD acknowledges funding from Italian Ministry of Education, University and Research (MIUR) through the "Dipartimenti di eccellenza" project Science of the Universe. PH acknowledges the support of the US Department of Energy Office of High-Energy Physics and the Laboratory Directed Research and Development (LDRD) program of Los Alamos National Laboratory. The authors would also like to thank M. Peloso and F. D'Eramo for useful discussions during the writing of this paper.Peer reviewe