Journal Article

PUBDB-2025-00336

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png ALP leptogenesis: non-thermal right-handed neutrinos from axions

Cataldi, M. (Corresponding author)Extern*DESY* ; Mariotti, A. ; Sala, F.Extern* ; Vanvlasselaer, M.

2024
Springer Heidelberg

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Please use a persistent id in citations: doi:10.1007/JHEP12(2024)125  doi:10.3204/PUBDB-2025-00336

Report No.: DESY-24-095; arXiv:2407.01667

Abstract: We propose a novel realisation of leptogenesis that relies on the out-of-equilibrium decay of an axion-like particle (ALP) into right-handed Majorana neutrinos (RHNs) in the early Universe. With respect to standard thermal leptogenesis, our mechanism lowers by two orders of magnitude the RHN mass, or the tuning in the RHN mass splittings, needed to reproduce the baryon asymmetry of the Universe and neutrino masses. We find that ALP leptogenesis requires m$_{a}$ > 10$^{4}$ GeV and f$_{a}$ > 10$^{11}$ GeV for the ALP mass and decay constant, and predicts an early period of matter domination induced by the ALP in parts of its parameter space. We finally provide a viable supersymmetric realisation of ALP leptogenesis where the ALP is the R-axion, which accommodates GeV gravitino dark matter and predicts RHN below 10 TeV.

Keyword(s): Baryo-and Leptogenesis ; Baryon/Lepton Number Violation ; Early Universe Particle Physics ; Axions and ALPs

Note: 29 pages, 10 figures

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Contributing Institute(s):

1. Uni Hamburg / Theorie (UNI/TH)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2024

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; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; National-Konsortium ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Cataldi, M. (Corresponding author)Extern*DESY* ; Mariotti, A. ; Sala, F. ; Vanvlasselaer, M.
ALP leptogenesis
[10.3204/PUBDB-2024-04875]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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