B-L Higgs Inflation With Several Consequences

We review the realization of non-minimal inflation driven by the quartic potential of a Higgs field which is involved in the breaking of a U(1)B-L gauge symmetry within Supersymmetric (SUSY) and non-SUSY models. Inflation is in agreement with the current data and can be attained for subplanckian values of the inflaton and its mass is predicted to be at most 4x10^13 GeV. We select models which retain the perturbative unitarity up to the Planck scale. The supergravity embedding of these models is achieved by employing a superpotential consistent with an R symmetry and quadratic Kahler potentials with a prominent shift-symmetric part proportional to c- and a tiny violation, proportional to c+, included in a logarithm with prefactor -N<0. Observationally acceptable results are obtained for 0.012<=c+/c-<1/N. Implications to the explanation of the mu term of the MSSM and baryogenesis via non-thermal leptogenesis may be also discussed.

Date: 
9 Nov 2017
Time: 
2:00pm
Location: 
215 Sharp Lab
Speaker: 
Dr. Costas Pallis, Aristotle University of Thessaloniki
Host: 
Shafi