Extend PBH dark matter bounds to realistic mass functions and spin distributions

Develop and perform a quantitative study of constraints on the primordial black hole dark matter fraction under the memory burden evaporation model for realistic, extended mass functions and non-zero spin distributions, rather than the monochromatic, zero-spin idealization used in the current analysis.

Background

To maintain generality and comparability, the paper computes constraints assuming a monochromatic primordial black hole mass function and zero spin. The authors note that actual primordial black holes are expected to form with extended mass distributions and possibly non-zero spin.

They explicitly leave the task of deriving bounds for more realistic mass and spin distributions to future work, indicating this as an unresolved practical problem necessary for comprehensive phenomenological assessments.

References

Studying bounds on the dark matter fraction of PBHs for more realistic mass functions and a non-zero spin distribution is left for future work.

— Breakdown of Hawking Evaporation opens new Mass Window for Primordial Black Holes as Dark Matter Candidate (2402.17823 - Thoss et al., 27 Feb 2024) in Section 4 (Summary and Conclusions)