Testing Hybrid Natural Inflation with BICEP2
  We analyse Hybrid Natural Inflation in view of the recent results for the
tensor index reported by BICEP2. We find that it predicts a large running of
the scalar spectrum which is potentially detectable by large scale structure
and $21\, \mathrm{cm} $ observations. The running of the running is also
relatively large becoming close to $10^{-2}$. Along the way, we find general
consistency relations at which observables are subject if the slow-roll
approximation is imposed. Failure to satisfy these equations by the values
obtained for the observables in surveys would be a failure of the slow-roll
approximation itself.
