Dynamical Chaotic Inflation in the Light of BICEP2
  The measurement of a large tensor-to-scalar ratio by the BICEP2 experiment, r
= 0.20 (-0.05)(+0.07), severely restricts the landscape of viable inflationary
models and shifts attention once more towards models featuring large inflaton
field values. In this context, chaotic inflation based on a fractional
power-law potential that is dynamically generated by the dynamics of a strongly
coupled supersymmetric gauge theory appears to be particularly attractive. We
revisit this class of inflation models and find that, in the light of the
BICEP2 measurement, models with a non-minimal gauge group behind the dynamical
model seem to be disfavored, while the model with the simplest group, i.e.
SU(2), is consistent with all results. We also discuss how the dynamical model
can be distinguished from the standard chaotic inflation model based on a
quadratic inflaton potential.
