978 citations · 8.1k across the 84 of their papers we have counts for
32 papers · 1 filter
Landscape tomography through primordial non-Gaussianity
Xingang Chen, Gonzalo A. Palma, Walter Riquelme +2
In this paper, we show how the structure of the landscape potential of the primordial Universe may be probed through the properties of the primordial density perturbations responsi…
Quantum Standard Clocks in the Primordial Trispectrum
Xingang Chen, Wan Zhen Chua, Yuxun Guo +3
We calculate the primordial trispectrum of curvature perturbation in quasi-single field inflation, with general sound speeds for both the inflaton and the massive scalar. Special a…
Schwinger-Keldysh Diagrammatics for Primordial Perturbations
Xingang Chen, Yi Wang, Zhong-Zhi Xianyu
We present a systematic introduction to the diagrammatic method for practical calculations in inflationary cosmology, based on Schwinger-Keldysh path integral formalism. We show in…
Standard Model Mass Spectrum in Inflationary Universe
Xingang Chen, Yi Wang, Zhong-Zhi Xianyu
We work out the Standard Model (SM) mass spectrum during inflation with quantum corrections, and explore its observable consequences in the squeezed limit of non-Gaussianity. Both…
Standard Model Background of the Cosmological Collider
Xingang Chen, Yi Wang, Zhong-Zhi Xianyu
The inflationary universe can be viewed as a "Cosmological Collider" with energy of Hubble scale, producing very massive particles and recording their characteristic signals in pri…
Loop Corrections to Standard Model Fields in Inflation
Xingang Chen, Yi Wang, Zhong-Zhi Xianyu
We calculate 1-loop corrections to the Schwinger-Keldysh propagators of Standard-Model-like fields of spin-0, 1/2, and 1, with all renormalizable interactions during inflation. We…