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Leptogenesis in minimal predictive seesaw models

Leptogenesis in minimal predictive seesaw models
Leptogenesis in minimal predictive seesaw models
We estimate the Baryon Asymmetry of the Universe (BAU) arising from leptogenesis within a class of minimal predictive seesaw models involving two right-handed neutrinos and simple Yukawa structures with one texture zero. The two right-handed neutrinos are dominantly responsible for the “atmospheric” and “solar” neutrino masses with Yukawa couplings to (νe, νμ, ντ) proportional to (0, 1, 1) and (1, n, n − 2), respectively, where n is a positive integer. The neutrino Yukawa matrix is therefore characterised by two proportionality constants with their relative phase providing a leptogenesis-PMNS link, enabling the lightest right-handed neutrino mass to be determined from neutrino data and the observed BAU. We discuss an SU(5) SUSY GUT example, where A4 vacuum alignment provides the required Yukawa structures with n = 3, while a Z9 symmetry fixes the relatives phase to be a ninth root of unity.
hep-ph
1029-8479
Bj�örkeroth, Fredrik
d6e34b2a-e55d-41f4-8d72-e723c9c3f4bf
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
Bj�örkeroth, Fredrik
d6e34b2a-e55d-41f4-8d72-e723c9c3f4bf
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

Bj�örkeroth, Fredrik, Anda, Francisco J. de, Varzielas, Ivo de Medeiros and King, Stephen F. (2015) Leptogenesis in minimal predictive seesaw models. The Journal of High Energy Physics, 10. (doi:10.1007/JHEP10(2015)104).

Record type: Article

Abstract

We estimate the Baryon Asymmetry of the Universe (BAU) arising from leptogenesis within a class of minimal predictive seesaw models involving two right-handed neutrinos and simple Yukawa structures with one texture zero. The two right-handed neutrinos are dominantly responsible for the “atmospheric” and “solar” neutrino masses with Yukawa couplings to (νe, νμ, ντ) proportional to (0, 1, 1) and (1, n, n − 2), respectively, where n is a positive integer. The neutrino Yukawa matrix is therefore characterised by two proportionality constants with their relative phase providing a leptogenesis-PMNS link, enabling the lightest right-handed neutrino mass to be determined from neutrino data and the observed BAU. We discuss an SU(5) SUSY GUT example, where A4 vacuum alignment provides the required Yukawa structures with n = 3, while a Z9 symmetry fixes the relatives phase to be a ninth root of unity.

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Accepted/In Press date: 23 September 2015
Published date: 15 October 2015
Additional Information: 16 pages, 2 tables. v2: minor changes, references added, version accepted in JHEP
Keywords: hep-ph
Organisations: Theory Group

Identifiers

Local EPrints ID: 410458
URI: https://eprints.soton.ac.uk/id/eprint/410458
ISSN: 1029-8479
PURE UUID: c5b8d4d1-9435-4353-8695-53c219d892b5

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Date deposited: 08 Jun 2017 16:31
Last modified: 13 Mar 2019 19:54

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Contributors

Author: Fredrik Bj�örkeroth
Author: Francisco J. de Anda
Author: Ivo de Medeiros Varzielas
Author: Stephen F. King

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