We discuss how a post-inflationary reheating phase characterized by a nonstandard multiple scalar field cosmology can change the thermal history of the Universe, affecting minimal high-scale leptogenesis. In particular, we explore a class of models where a set of scalar fields in a brane-inspired dynamical scenario modifies the Boltzmann equations concerning standard leptogenesis. The produced lepton asymmetry YL, due to the decays of heavy Majorana right-handed neutrinos responsible for generating Standard Model neutrino masses via the type-I seesaw, is affected as well. In particular, both an enhancement and a reduction of YL can be obtained, depending on the values of the (new) involved parameters and on the number of additional scalar fields.

Di Marco, A., Dutta Banik, A., Ghoshal, A., Pradisi, G. (2023). Minimal leptogenesis in brane-inspired cosmology. PHYSICAL REVIEW D, 107 [10.1103/PhysRevD.107.103509].

Minimal leptogenesis in brane-inspired cosmology

Gianfranco Pradisi
Membro del Collaboration Group
2023-05-10

Abstract

We discuss how a post-inflationary reheating phase characterized by a nonstandard multiple scalar field cosmology can change the thermal history of the Universe, affecting minimal high-scale leptogenesis. In particular, we explore a class of models where a set of scalar fields in a brane-inspired dynamical scenario modifies the Boltzmann equations concerning standard leptogenesis. The produced lepton asymmetry YL, due to the decays of heavy Majorana right-handed neutrinos responsible for generating Standard Model neutrino masses via the type-I seesaw, is affected as well. In particular, both an enhancement and a reduction of YL can be obtained, depending on the values of the (new) involved parameters and on the number of additional scalar fields.
10-mag-2023
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/02
English
Con Impact Factor ISI
Baryogenesis & leptogenesis; Cosmology
Di Marco, A., Dutta Banik, A., Ghoshal, A., Pradisi, G. (2023). Minimal leptogenesis in brane-inspired cosmology. PHYSICAL REVIEW D, 107 [10.1103/PhysRevD.107.103509].
Di Marco, A; Dutta Banik, A; Ghoshal, A; Pradisi, G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/351986
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