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
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
15 October 2015
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.
Journal of High Energy Physics, 10, [104].
(doi:10.1007/JHEP10(2015)104).
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
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Local EPrints ID: 410458
URI: http://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: 15 Mar 2024 14:00
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Author:
Fredrik Bj�örkeroth
Author:
Francisco J. de Anda
Author:
Ivo de Medeiros Varzielas
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