Higher N-point function non-Gaussianity

We have recently published innovative work searching for the first time for higher N-point function non-Gaussianity in the CMB , going beyond the current bispectrum and trispectrum analysis. Such signatures are generated by non-adiabatic particle production during inflation, a phenomenon often arising in UV completions of inflation. This work shows that we are far from a systematic or complete search for UV physics, even in the already available data.