Curvatons in the minimally supersymmetric standard model

Details Curvatons in the minimally supersymmetric standard model Curvatons in the minimally supersymmetric standard model

2004-03-26

arxiv.org/abs/hep-ph/0403273v2

Mod.Phys.Lett. A19 (2004) 1421-1434

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 1 Figure

Scientific paper

10.1142/S0217732304013970

Curvaton is an effectively massless field whose energy density during inflation is negligible but which later becomes dominant. This is a novel mechanism to generate the scale invariant perturbations. I discuss the possibility that the curvaton could be found among the fields of the minimally supersymmetric standard model (MSSM), which contains a number of flat directions along which the renormalizable potential vanishes. The requirements of late domination and the absence of damping of the perturbations pick out essentially a unique candidate for the MSSM curvaton. One must also require that inflation takes place in a hidden sector. If the inflaton energy density can be radiated into extra dimensions, many constraints can be relaxed, and the simplest flat direction consisting of the Higgses H_u and H_d would provide a working example of an MSSM curvaton.

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