Enhanced tensor non-Gaussianities in presence of a source
  We address the possibility of having an enhanced signal for tensor
non-Gaussianities in presence of a source, as a signature of Primordial
Gravitational Waves. We employ a nearly model-independent framework based on
Effective Field Theory of inflation and compute tensor non-Gaussianities
therefrom sourced by particle production during (p)reheating to arrive at an
enhanced signal strength. We obtain the model-independent non-linearity
parameters and also find that squeezed limit bispectra are more enhanced than
equilateral limit.
