Assessing the tension between a black hole dominated early universe and leptogenesis

Perez-Gonzalez, Yuber F.; Turner, Jessica

Abstract

We perform the first numerical calculation of the interplay between thermal and black hole induced leptogenesis, demonstrating that the right-handed neutrino surplus produced during the evaporation only partially mitigates the entropy dilution suffered by the thermal component. As such, the intermediate-mass regime of the right-handed neutrinos, 106 GeV ≲ MN ≲ 109 GeV, could not explain the observed baryon asymmetry even for fine-tuned scenarios if there existed a primordial black hole dominated era, consistent with initial black hole masses of Mi ≳ Oð1Þ kg and initial energy density fractions larger than β0 ≳ 10−6. A possible detection of the gravitational waves emitted from the same primordial black holes would place intermediate-scale thermal leptogenesis under tension

Citation

Perez-Gonzalez, Y. F., & Turner, J. (2021). Assessing the tension between a black hole dominated early universe and leptogenesis. Physical Review D, 104(10), https://doi.org/10.1103/physrevd.104.103021

• Journal Article Type: Article
• Acceptance Date: Oct 21, 2021
• Online Publication Date: Nov 16, 2021
• Publication Date: 2021
• Deposit Date: Feb 1, 2022
• Publicly Available Date: Feb 1, 2022
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 2470-0029
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 104
• Issue: 10
• DOI: https://doi.org/10.1103/physrevd.104.103021