The Sensitivity Floor for Primordial Black Holes Neutrino Searches

Primordial black holes(PBHs) are a well-motivated dark matter (DM) candidate over a wide range of masses. Light, asteroid-mass primordial black holes could be detected using neutrinos produced via Hawking radiation. We discuss using neutrino to search for non-rotating PBHs with monochromatic mass distributions, spanning from 5 × 10¹⁴ g to 10¹⁶ g. We consider the null observations of antineutrino flux from several neutrino detectors and set new constraints on the PBHs as a dark matter candidate. We also set the constraint using data from forecasts on JUNO detectors. In addition, we note that the Diffuse Supernova Neutrino Background(DSNB) is an unavoidable isotropic background, we thus estimate the sensitivity floor up to mass about 10¹⁶ g caused by DSNB on PBHs dark matter.