Regular Article - Theoretical Physics
Enhanced tensor non-Gaussianities in presence of a source
Physics and Applied Mathematics Unit, Indian Statistical Institute, 700108, Kolkata, India
Accepted: 6 December 2020
Published online: 14 December 2020
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 non-linearity parameters and also find that squeezed limit bispectra are more enhanced than equilateral limit.
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