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Leptogenesis in a Δ(27) × SO(10) SUSY GUT

Leptogenesis in a Δ(27) × SO(10) SUSY GUT
Leptogenesis in a Δ(27) × SO(10) SUSY GUT
Although SO(10) Supersymmetric (SUSY) Grand Unification Theories (GUTs) are very attractive for neutrino mass and mixing, it is often quite difficult to achieve successful leptogenesis from the lightest right-handed neutrino N_1 due to the strong relations between neutrino and up-type quark Yukawa couplings. We show that in a realistic model these constraints are relaxed, making N_1 leptogenesis viable. To illustrate this, we calculate the baryon asymmetry of the Universe Y_B from flavoured N_1 leptogenesis in a recently proposed Δ(27) × SO(10) SUSY GUT. The flavoured Boltzmann equations are solved numerically, and comparison with the observed Y_B places constraints on the allowed values of right-handed neutrino masses and neutrino Yukawa couplings. The flavoured SO(10) SUSY GUT is not only fairly complete and predictive in the lepton sector, but can also explain the BAU through leptogenesis with natural values in the lepton sector albeit with some tuning in the quark sector.
hep-ph
1029-8479
Björkeroth, Fredrik
7ad4ebf0-2444-4e86-a7bb-baf017e8eff6
Anda, Francisco J. de
dbb27610-c99c-4727-9158-5a2c155f61de
Varzielas, Ivo de Medeiros
9e2b1443-1449-4687-8d03-2f67275730c0
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
Björkeroth, Fredrik
7ad4ebf0-2444-4e86-a7bb-baf017e8eff6
Anda, Francisco J. de
dbb27610-c99c-4727-9158-5a2c155f61de
Varzielas, Ivo de Medeiros
9e2b1443-1449-4687-8d03-2f67275730c0
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538

Björkeroth, Fredrik, Anda, Francisco J. de, Varzielas, Ivo de Medeiros and King, Stephen F. (2017) Leptogenesis in a Δ(27) × SO(10) SUSY GUT. Journal of High Energy Physics, 01, [77]. (doi:10.1007/JHEP01(2017)077).

Record type: Article

Abstract

Although SO(10) Supersymmetric (SUSY) Grand Unification Theories (GUTs) are very attractive for neutrino mass and mixing, it is often quite difficult to achieve successful leptogenesis from the lightest right-handed neutrino N_1 due to the strong relations between neutrino and up-type quark Yukawa couplings. We show that in a realistic model these constraints are relaxed, making N_1 leptogenesis viable. To illustrate this, we calculate the baryon asymmetry of the Universe Y_B from flavoured N_1 leptogenesis in a recently proposed Δ(27) × SO(10) SUSY GUT. The flavoured Boltzmann equations are solved numerically, and comparison with the observed Y_B places constraints on the allowed values of right-handed neutrino masses and neutrino Yukawa couplings. The flavoured SO(10) SUSY GUT is not only fairly complete and predictive in the lepton sector, but can also explain the BAU through leptogenesis with natural values in the lepton sector albeit with some tuning in the quark sector.

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More information

Accepted/In Press date: 10 January 2017
e-pub ahead of print date: 17 January 2017
Published date: 17 January 2017
Additional Information: v1: 18 pages, 4 figures; v2: 20 pages, 4 figures. Expanded discussion of results, with new figures; v3: 22 pages, 4 figures. Version accepted in JHEP, new fit added
Keywords: hep-ph
Organisations: Theory Group, Physics & Astronomy

Identifiers

Local EPrints ID: 409756
URI: http://eprints.soton.ac.uk/id/eprint/409756
ISSN: 1029-8479
PURE UUID: 67580279-f1ff-44d6-9952-97e010d9ed7b

Catalogue record

Date deposited: 01 Jun 2017 04:07
Last modified: 16 Dec 2019 19:01

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Contributors

Author: Fredrik Björkeroth
Author: Francisco J. de Anda
Author: Ivo de Medeiros Varzielas
Author: Stephen F. King

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