Speaker
Description
Cosmological parity violation offers a unique way to probe the primordial non-Gaussianity. Recent studies have indicated that measuring parity-violating signals from large-scale structure observations are possible. These signals can arise naturally through the exchange of heavy spinning particles, with chemical potential enhancement, during cosmic inflation. In this talk, we will present a systematic pipeline that relates the primordial trispectra of such cosmological collider processes to the observables in the galaxy surveys. In particular, we focus on several toy models and a full spin-1 model that exhibit parity violation, using the Schwinger-Keldysh formalism and isotropic function formalism to compute the trispectra and corresponding four-point correlation functions, respectively. Our results highlight the need for further studies to provide more precise predictions for cosmological parity-violating signals from the perspective of particle physics.
