Low-scale Supersymmetry from Inflation

Details Low-scale Supersymmetry from Inflation Low-scale Supersymmetry from Inflation

2011-07-30

arxiv.org/abs/1108.0070v2

JCAP10(2011)033

Physics

High Energy Physics

High Energy Physics - Phenomenology

23pages, 3 figures. v2: references added

Scientific paper

10.1088/1475-7516/2011/10/033

We investigate an inflation model with the inflaton being identified with a Higgs boson responsible for the breaking of U(1)B-L symmetry. We show that supersymmetry must remain a good symmetry at scales one order of magnitude below the inflation scale, in order for the inflation model to solve the horizon and flatness problems, as well as to account for the observed density perturbation. The upper bound on the soft supersymmetry breaking mass lies between 1TeV and 10^3TeV. Interestingly, our finding opens up a possibility that universes with the low-scale supersymmetry are realized by the inflationary selection. Our inflation model has rich implications; non-thermal leptogenesis naturally works, and the gravitino and moduli problems as well as the moduli destabilization problem can be solved or ameliorated; the standard-model higgs boson receives a sizable radiative correction if the supersymmertry breaking takes a value on the high side ~10^3TeV.

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