Kinetically Modified Non-Minimal Chaotic Inflation
  We consider Supersymmetric (SUSY) and non-SUSY models of chaotic inflation
based on the phi^n potential with 2<=n<=6. We show that the coexistence of a
nonminimal coupling to gravity, fR=1+cR phi^(n/2), with a kinetic mixing of the
form fK=cK fR^m can accommodate values of the spectral index, ns, and the
tensor-to-scalar ratio, r, favored by the Bicep2/Keck Array and Planck results
for 0<=m<=4 and 2.5x10^(-4)<=rRK=cR/cK^{n/4}<=1, where the upper limit is not
imposed for n=2. Inflation can be attained for subplanckian inflaton values
with the corresponding effective theories retaining the perturbative unitarity
up to the Planck scale.
