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Flavon inflation

Flavon inflation
Flavon inflation
We propose an entirely new class of particle physics models of inflation based on the phase transition associated with the spontaneous breaking of family symmetry responsible for the generation of the effective quark and lepton Yukawa couplings. We show that the Higgs fields responsible for the breaking of family symmetry, called flavons, are natural candidates for the inflaton field in new inflation, or the waterfall fields in hybrid inflation. This opens up a rich vein of possibilities for inflation, all linked to the physics of flavour, with interesting cosmological and phenomenological implications. Out of these, we discuss two examples which realise flavon inflation: a model of new inflation based on the discrete non-Abelian family symmetry group A4 or ?27, and a model of hybrid inflation embedded in an existing flavour model with a continuous SU(3) family symmetry. With the inflation scale and family symmetry breaking scale below the Grand Unification Theory (GUT) scale, these classes of models are free of the monopole (and similar) problems which are often associated with the GUT phase transition.
0370-2693
176-180
Antusch, S.
5c4a4555-199c-4b90-9590-f4c392ee850c
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538
Malinsky, M.
86c30d1c-048f-4462-8abd-305503a54e36
Velasco-Sevilla, L.
e921886f-8129-43a2-afba-02b474381cc5
Zavala, L.
2be4c386-3c5a-41b8-9417-2c786805cc37
Antusch, S.
5c4a4555-199c-4b90-9590-f4c392ee850c
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538
Malinsky, M.
86c30d1c-048f-4462-8abd-305503a54e36
Velasco-Sevilla, L.
e921886f-8129-43a2-afba-02b474381cc5
Zavala, L.
2be4c386-3c5a-41b8-9417-2c786805cc37

Antusch, S., King, S.F., Malinsky, M., Velasco-Sevilla, L. and Zavala, L. (2008) Flavon inflation. Physics Letters B, 666 (2), 176-180. (doi:10.1016/j.physletb.2008.07.051).

Record type: Article

Abstract

We propose an entirely new class of particle physics models of inflation based on the phase transition associated with the spontaneous breaking of family symmetry responsible for the generation of the effective quark and lepton Yukawa couplings. We show that the Higgs fields responsible for the breaking of family symmetry, called flavons, are natural candidates for the inflaton field in new inflation, or the waterfall fields in hybrid inflation. This opens up a rich vein of possibilities for inflation, all linked to the physics of flavour, with interesting cosmological and phenomenological implications. Out of these, we discuss two examples which realise flavon inflation: a model of new inflation based on the discrete non-Abelian family symmetry group A4 or ?27, and a model of hybrid inflation embedded in an existing flavour model with a continuous SU(3) family symmetry. With the inflation scale and family symmetry breaking scale below the Grand Unification Theory (GUT) scale, these classes of models are free of the monopole (and similar) problems which are often associated with the GUT phase transition.

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Published date: 14 August 2008
Organisations: Physics & Astronomy

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Local EPrints ID: 144085
URI: https://eprints.soton.ac.uk/id/eprint/144085
ISSN: 0370-2693
PURE UUID: 57246cd1-cb97-4e35-af47-f692853d606b

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Date deposited: 18 Apr 2011 14:47
Last modified: 17 Jul 2019 00:07

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Contributors

Author: S. Antusch
Author: S.F. King
Author: M. Malinsky
Author: L. Velasco-Sevilla
Author: L. Zavala

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