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A model of cosmology and particle physics at an intermediate scale

A model of cosmology and particle physics at an intermediate scale
A model of cosmology and particle physics at an intermediate scale
We propose a model of cosmology and particle physics in which all relevant scales arise in a natural way from an intermediate string scale. We are led to assign the string scale to the intermediate scale M*~1013 GeV by four independent pieces of physics: electroweak symmetry breaking; the µ parameter; the axion scale; and the neutrino mass scale. The model involves hybrid inflation with the waterfall field N being responsible for generating the µ term, the right-handed neutrino mass scale, and the Peccei-Quinn symmetry breaking scale. The large scale structure of the Universe is generated by the lightest right-handed sneutrino playing the rôle of a coupled curvaton. We show that the correct curvature perturbations may be successfully generated providing the lightest right-handed neutrino is weakly coupled in the seesaw mechanism, consistent with sequential dominance.
1550-7998
103517-[12pp]
Bastero-Gil, M.
b329c554-20e8-4180-af13-faaa34be2f84
Di Clemente, V.
4f38d85a-1c05-44c2-9e50-1ab950ca843f
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538
Bastero-Gil, M.
b329c554-20e8-4180-af13-faaa34be2f84
Di Clemente, V.
4f38d85a-1c05-44c2-9e50-1ab950ca843f
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538

Bastero-Gil, M., Di Clemente, V. and King, S.F. (2005) A model of cosmology and particle physics at an intermediate scale. Physical Review D, 71, 103517-[12pp]. (doi:10.1103/PhysRevD.71.103517).

Record type: Article

Abstract

We propose a model of cosmology and particle physics in which all relevant scales arise in a natural way from an intermediate string scale. We are led to assign the string scale to the intermediate scale M*~1013 GeV by four independent pieces of physics: electroweak symmetry breaking; the µ parameter; the axion scale; and the neutrino mass scale. The model involves hybrid inflation with the waterfall field N being responsible for generating the µ term, the right-handed neutrino mass scale, and the Peccei-Quinn symmetry breaking scale. The large scale structure of the Universe is generated by the lightest right-handed sneutrino playing the rôle of a coupled curvaton. We show that the correct curvature perturbations may be successfully generated providing the lightest right-handed neutrino is weakly coupled in the seesaw mechanism, consistent with sequential dominance.

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Published date: 2005

Identifiers

Local EPrints ID: 57040
URI: https://eprints.soton.ac.uk/id/eprint/57040
ISSN: 1550-7998
PURE UUID: c7911c85-26b4-4311-ab4a-43140dd104e7

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

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Contributors

Author: M. Bastero-Gil
Author: V. Di Clemente
Author: S.F. King

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