Speaker
Description
We study the signature of the final stage of the evaporation of primordial black holes (PBH), focusing on high energy neutrinos and gamma-rays. For distributions of PBH with finite widths in mass spectrum, we derive a new upper limits $f_{\rm PBH} \lesssim 10^{-4} - 1$ for $M_{\rm PBH} = 10^{15-20}$ g by utilizing the IceCube latest data set of diffuse neutrinos for $E_\nu \geq 30$ TeV. We note that a transient signature involving high-energy neutrinos at the final stage of primordial black hole (PBH) evaporation could offer a potential explanation for the recently reported ultra-high-energy (UHE) neutrino event by the KM3NeT collaboration. We also examine the sensitivity limit for detecting a single PBH burst as the origin of KM3NeT UHE event.
