http://arxiv.org/abs/1803.00349
Models of induced-gravity inflation are formulated within Supergravity employing as inflaton the Higgs field which leads to a spontaneous breaking of a U(1)B-L symmetry at Mgut=2×10^16 GeV. We use a renormalizable superpotential, fixed by a U(1) R symmetry, and Kahler potentials which exhibit a prominent shift-symmetric part and a tiny violation included in a logarithm with prefactor -(2n+3) or -2(1+n). We find inflationary solutions of Starobinsky type for -0.06<= n<= 0.051 and others (more marginal) which resemble those of linear inflation for -0.32<= n<= -0.15. In both cases the inflaton mass is predicted to be of the order of 10^13 GeV. Extending the superpotential of the model with suitable terms, we show how the MSSM mu parameter can be generated. Also, non-thermal leptogenesis can be successfully realized, provided that the gravitino is heavier than about 10 TeV.
C. Pallis and Q. Shafi
Fri, 2 Mar 18
9/61
Comments: N/A
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