Abstract
The possible existence of primordial black holes (PBHs) has long been a key observational question. At present, the only known way to detect low-mass ones (below 10 15 g) is through the Hawking radiation process. This radiation in turn depends on the nature of hadron interactions in the 100 MeV region and beyond. In the case of a first-order quantum-chromodynamics phase transition, we expect a sharp burst of gamma rays from the PBH. We have pointed out that there is a class of gamma-ray bursts that have this property and could provide evidence for PBHs in the galaxy. Future study of these events is crucial. Recently, we have shown that a diffuse gamma-ray glow should exist in the halo from these PBHs. There now seems to be evidence for this effect as well.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
