Topical seminar: "Explor(d)ing Primordial Black Holes: Gamma-ray and Neutrino"

por Joaquim Iguaz Juan (University of Massachusetts Amherst)

viernes 30 ene. 2026 12:00 → 14:00 Europe/Madrid

1001-Primera-1-1-1 - Paterna. Seminario (Universe)

Observation of an exploding black hole would provide the first direct evidence of primordial black holes, of Hawking radiation, and provide definitive information on the particle spectrum of nature. Interestingly, a black hole explosion would produce large amounts of both photons and neutrinos, which we could detect with currently operating telescopes. However, indirect constraints suggest that direct observation of an exploding Schwarzschild black hole is implausible. We introduce a dark-QED toy model consisting of a dark photon and a heavy dark electron. For the first time we show that a population of primordial black holes can become quasi-extremal and significantly weaken the indirect constraints, before the black holes discharge towards the end of their lives and exhibit a Schwarzschild-like final explosion. In this scenario the answer is "yes'', it is possible that we could directly observe an exploding black hole in the near future. We also link the recent KM3NeT observation to an exploding black hole and find a plausible explanation that can solve some tensions with IceCube and account for DM at the same time.