Leptogenesis in SO(10) with minimal Yukawa sector
Leptogenesis in SO(10) with minimal Yukawa sector
In prior studies, a very minimal Yukawa sector within the SO(10) Grand Unified Theory framework has been identified, comprising of Higgs fields belonging to a real 10H, a real 120H, and a 126H dimensional representations. In this work, within this minimal framework, we have obtained fits to fermion masses and mixings while successfully reproducing the cosmological baryon asymmetry via leptogenesis. The right-handed neutrino (Ni) mass spectrum obtained from the fit is strongly hierarchical, suggesting that B − L asymmetry is dominantly produced from N2 dynamics while N1 is responsible for erasing the excess asymmetry. With this rather constrained Yukawa sector, fits are obtained both for normal and inverted ordered neutrino mass spectra, consistent with leptonic CP-violating phase δCP indicated by global fits of neutrino oscillation data, while also satisfying the current limits from neutrinoless double beta decay experiments. In particular, the leptonic CP-violating phase has a preference to be in the range δCP ≃ (230 – 300)°. We also show the consistency of the framework with gauge coupling unification and proton lifetime limits.
hep-ph
Babu, K.S.
f63cb870-e593-48df-841a-4202320b6aba
Bari, Pasquale Di
3fe21e59-0eff-41bc-8faa-fdd817146418
Fong, Chee Sheng
61208474-3bf4-40c7-b1d9-e8a1c43b1d4e
Saad, Shaikh
5945fafa-292a-43d5-885f-4975f79f3526
Babu, K.S.
f63cb870-e593-48df-841a-4202320b6aba
Bari, Pasquale Di
3fe21e59-0eff-41bc-8faa-fdd817146418
Fong, Chee Sheng
61208474-3bf4-40c7-b1d9-e8a1c43b1d4e
Saad, Shaikh
5945fafa-292a-43d5-885f-4975f79f3526
Babu, K.S., Bari, Pasquale Di, Fong, Chee Sheng and Saad, Shaikh
(2024)
Leptogenesis in SO(10) with minimal Yukawa sector.
Journal of High Energy Physics, [190].
(doi:10.1007/JHEP10(2024)190).
Abstract
In prior studies, a very minimal Yukawa sector within the SO(10) Grand Unified Theory framework has been identified, comprising of Higgs fields belonging to a real 10H, a real 120H, and a 126H dimensional representations. In this work, within this minimal framework, we have obtained fits to fermion masses and mixings while successfully reproducing the cosmological baryon asymmetry via leptogenesis. The right-handed neutrino (Ni) mass spectrum obtained from the fit is strongly hierarchical, suggesting that B − L asymmetry is dominantly produced from N2 dynamics while N1 is responsible for erasing the excess asymmetry. With this rather constrained Yukawa sector, fits are obtained both for normal and inverted ordered neutrino mass spectra, consistent with leptonic CP-violating phase δCP indicated by global fits of neutrino oscillation data, while also satisfying the current limits from neutrinoless double beta decay experiments. In particular, the leptonic CP-violating phase has a preference to be in the range δCP ≃ (230 – 300)°. We also show the consistency of the framework with gauge coupling unification and proton lifetime limits.
Text
2409.03840v1
- Author's Original
Text
JHEP10(2024)190
- Version of Record
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Accepted/In Press date: 2 October 2024
e-pub ahead of print date: 25 October 2024
Keywords:
hep-ph
Identifiers
Local EPrints ID: 496311
URI: http://eprints.soton.ac.uk/id/eprint/496311
ISSN: 1126-6708
PURE UUID: 5858369e-ed05-4c53-9f29-d9c0cf1dec75
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Date deposited: 11 Dec 2024 17:46
Last modified: 11 Dec 2024 17:46
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Author:
K.S. Babu
Author:
Chee Sheng Fong
Author:
Shaikh Saad
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