Kinetically Modified Non-Minimal Higgs Inflation in Supergravity
  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. We
combine a superpotential, which is uniquely determined by applying a continuous
R symmetry, with a class of logarithmic or semi-logarithmic Kahler potentials
which exhibit a prominent shift-symmetry with a tiny violation, whose strengths
are quantified by c- and c+ respectively. The inflationary observables provide
an excellent match to the recent BICEP2/Keck Array and Planck results setting
3.5x10^-3<=r+-=c+/c-<=1/N where N=3 or 2 is the prefactor of the logarithm.
Inflation can be attained for subplanckian inflaton values with the
corresponding effective theories retaining the perturbative unitarity up to the
Planck scale.
