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Superradiant leptogenesis

Ghoshal, Anish; Perez-Gonzalez, Yuber F.; Turner, Jessica

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Anish Ghoshal


We investigate how superradiance affects the generation of baryon asymmetry in a universe with rotating primordial black holes, considering a scenario where a scalar boson is coupled to the heavy right-handed neutrinos. We identify the regions of the parameter space where the scalar production is enhanced due to superradiance. This enhancement, coupled with the subsequent decay of the scalar into right handed neutrinos, results in the non-thermal creation of lepton asymmetry. We show that successful leptogenesis is achieved for masses of primordial black holes in the range of order O(0.1 g) − O(10 g) and the lightest of the heavy neutrino masses, MN ~ O(1012) GeV. Consequently, regions of the parameter space, which in the case of Schwarzchild PBHs were incompatible with viable leptogenesis, can produce the observed matter-antimatter asymmetry.


Ghoshal, A., Perez-Gonzalez, Y. F., & Turner, J. (2024). Superradiant leptogenesis. Journal of High Energy Physics, 2024(2), Article 113.

Journal Article Type Article
Acceptance Date Jan 27, 2024
Online Publication Date Feb 15, 2024
Publication Date Feb 15, 2024
Deposit Date Mar 18, 2024
Publicly Available Date Mar 18, 2024
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2024
Issue 2
Article Number 113
Keywords Sterile or Heavy Neutrinos, Baryo-and Leptogenesis, Cosmology of Theories BSM, Baryon/Lepton Number Violation
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