Photon spectra from final stages of a primordial black hole evaporation in different theoretical models

Understand

Possibilities of an experimental search for gamma-ray bursts from primordial black hole (PBH) evaporations in space are reconsidered.

• It is argued that the corresponding constraints which can be obtained in experiments with cosmic ray detectors strongly depend on theoretical approach used for a description of the PBH evaporation process.
• Predictions of several theoretical models for gamma-ray spectra from final stages of PBH life (integrated over time) are given.