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Large scale structure from the Higgs fields of the supersymmetric standard model

Large scale structure from the Higgs fields of the supersymmetric standard model
Large scale structure from the Higgs fields of the supersymmetric standard model
We propose an alternative implementation of the curvaton mechanism for generating the curvature perturbations which does not rely on a late decaying scalar decoupled from inflation dynamics. In our mechanism the supersymmetric Higgs scalars are coupled to the inflaton in a hybrid inflation model, and this allows the conversion of the isocurvature perturbations of the Higgs fields to the observed curvature perturbations responsible for large scale structure to take place during reheating. We discuss an explicit model which realizes this mechanism in which the ? term in the Higgs superpotential is generated after inflation by the vacuum expectation value of a singlet field. The main prediction of the model is that the spectral index should deviate significantly from unity, |n-1|?0.1. We also expect relic isocurvature perturbations in neutralinos and baryons, but no significant departures from Gaussianity and no observable effects of gravity waves in the CMB spectrum.
1550-7998
103516-[13pp]
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. (2003) Large scale structure from the Higgs fields of the supersymmetric standard model. Physical Review D, 67 (10), 103516-[13pp]. (doi:10.1103/PhysRevD.67.103516).

Record type: Article

Abstract

We propose an alternative implementation of the curvaton mechanism for generating the curvature perturbations which does not rely on a late decaying scalar decoupled from inflation dynamics. In our mechanism the supersymmetric Higgs scalars are coupled to the inflaton in a hybrid inflation model, and this allows the conversion of the isocurvature perturbations of the Higgs fields to the observed curvature perturbations responsible for large scale structure to take place during reheating. We discuss an explicit model which realizes this mechanism in which the ? term in the Higgs superpotential is generated after inflation by the vacuum expectation value of a singlet field. The main prediction of the model is that the spectral index should deviate significantly from unity, |n-1|?0.1. We also expect relic isocurvature perturbations in neutralinos and baryons, but no significant departures from Gaussianity and no observable effects of gravity waves in the CMB spectrum.

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Published date: 2003

Identifiers

Local EPrints ID: 57037
URI: https://eprints.soton.ac.uk/id/eprint/57037
ISSN: 1550-7998
PURE UUID: 2fac30ea-bc10-45eb-a59d-da5639c7e9f0

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

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