A bstract In direct analogy to the 4-body decay of a heavy scalar particle, the 4-point
correlation function of primordial fluctuations carries P and CP information. The CP violation …

A bstract We look for oscillating signals in the primordial bispectrum from new physics heavy
particles which are visibly large for next generation large scale structures (LSS) survey. We …

We study the effects of a massive field with a continuous spectrum (continuum isocurvaton)
on the inflationary bispectrum in the squeezed limit. As a concrete example, we extend the …

A bstract Massive fields can imprint unique oscillatory features on primordial correlation
functions or inflationary correlators, which is dubbed the cosmological collider signal. In this …

A bstract Constant-rate inflation, including ultra-slow-roll inflation as a special case, has
been widely applied to the formation of primordial black holes with a significant deviation …

A bstract Cosmological colliders can preserve information from interactions at very high
energy scale, and imprint them on cosmological observables. Taking the squeezed limit of …

A bstract We study effects of multiple scalar fields (scalar isocurvatons) with the Hubble
scale masses on the inflationary bispectrum in the squeezed limit, particular paying attention …

A bstract The observed low-energy values of the SU (3)× SU (2)× U (1) gauge couplings,
extrapolated via the minimal Standard Model Renormalization Group evolution, hint at the …

A bstract We discuss two possible scenarios, namely the curvaton mechanism and the dark
matter density modulation, where non-Gaussianity signals of superheavy dark matter …

The cosmological collider provides a model-independent probe of particle physics during
inflation. We extend the study of cosmological collider physics to much smaller scales …