ASYMMETRY WEBINAR: Wednesday, June 17 at 4:00 PM (CEST)

Speaker: Yuber Gonzalez-Perez (IFT UAM/CSIC)

Title: Multi-messenger Constraints on a Primordial Black Hole Origin of the KM3-230213A Event.

Abstract: A black hole is expected to end its life in a runaway burst of Hawking radiation, emitting all Standard Model particles at ultra-high energies. A recent ~220 PeV neutrino-like event reported by KM3NeT has been suggested as a possible signal from the explosion of a primordial black hole (PBH), which would require the source to lie at (1 - 7) x10^{-5} pc, i.e. within the Solar System. At such distances, an intense accompanying flux of gamma rays and cosmic rays would be unavoidable. Accounting for the time-dependent field of view of gamma-ray observatories, we find that LHAASO should have detected O(10^8) events hours before the KM3NeT trigger, while IceCube and KM3NeT itself should have observed hundreds of lower-energy neutrinos in the preceding day. The absence of any such multi-messenger signal strongly disfavours a minimal four-dimensional Schwarzschild PBH evaporation origin for the KM3-230213A event. Independently of the origin of this particular event, we briefly discuss the prospects for observing a nearby PBH explosion and outline the beyond-the-Standard-Model physics that could be probed by such an observation.

Slides: files/YFPG_ASYM--Compressed.pdf