The University of Southampton
University of Southampton Institutional Repository

Neutrino mass models and leptogenesis

Neutrino mass models and leptogenesis
Neutrino mass models and leptogenesis
In this talk we show how a natural neutrino mass hierarchy can follow from the type I see-saw mechanism, and a natural neutrino mass degeneracy from the type II see-saw mechanism, where the bi-large mixing angles can arise from either the neutrino or charged lepton sector.We summarize the phenomenological implications of such natural models, and discuss the model building applications of the approach, focussing on the SU(3) × SO(10) model. We also show that in such type II models the leptogenesis asymmetry parameter becomes proportional to the neutrino mass scale, in sharp contrast to the type I case, which leads to an upper bound on the neutrino mass scale, allowing lighter right-handed neutrinos and hence making leptogenesis more consistent with the gravitino constraints in supersymmetric models.
0031-8949
178-184
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538

King, S.F. (2005) Neutrino mass models and leptogenesis. Physica Scripta, T121., 178-184.

Record type: Article

Abstract

In this talk we show how a natural neutrino mass hierarchy can follow from the type I see-saw mechanism, and a natural neutrino mass degeneracy from the type II see-saw mechanism, where the bi-large mixing angles can arise from either the neutrino or charged lepton sector.We summarize the phenomenological implications of such natural models, and discuss the model building applications of the approach, focussing on the SU(3) × SO(10) model. We also show that in such type II models the leptogenesis asymmetry parameter becomes proportional to the neutrino mass scale, in sharp contrast to the type I case, which leads to an upper bound on the neutrino mass scale, allowing lighter right-handed neutrinos and hence making leptogenesis more consistent with the gravitino constraints in supersymmetric models.

Full text not available from this repository.

More information

Submitted date: 24 November 2004
Published date: 2005

Identifiers

Local EPrints ID: 57369
URI: http://eprints.soton.ac.uk/id/eprint/57369
ISSN: 0031-8949
PURE UUID: 7a227ea9-afa0-4d1b-a74d-8ddbd23b2156

Catalogue record

Date deposited: 14 Aug 2008
Last modified: 13 Mar 2019 20:34

Export record

Contributors

Author: S.F. King

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×