Speaker
Description
Abstract content
We consider models of chaotic inflation driven by the real parts
of a conjugate pair of Higgs superfields involved in the
spontaneous breaking of a grand unification symmetry at a scale
assuming its Supersymmetric value. Employing Kaehler potentials
with a prominent shift-symmetric part proportional to c- and a
tiny violation, proportional to c+, included in a logarithm we
show that the inflationary observables provide an excellent match
to the recent Planck and Bicep2/Keck Array results setting, e.g.,
0.012<= c+/c- <=1/N where N=2 or 3 is the prefactor of the
logarithm. Deviations of these prefactors from their integer
values above are also explored and a region where hilltop
inflation occurs is localized. Moreover, we analyze several
possible stabilization mechanisms for the non-inflaton
accompanying superfield using just quadratic terms. In all cases,
inflation can be attained for subplanckian inflaton values with
the corresponding effective theories retaining the perturbative
unitarity up to the Planck scale.
