3 papers
hep-ph2020
Cosmological Signatures of Superheavy Dark Matter
Lingfeng Li, Shiyun Lu, Yi Wang +1
We discuss two possible scenarios, namely the curvaton mechanism and the dark matter density modulation, where non-Gaussianity signals of superheavy dark matter produced by gravity…
hep-th2019
A Cosmological Higgs Collider
Shiyun Lu, Yi Wang, Zhong-Zhi Xianyu
The quantum fluctuations of the Higgs field during inflation could be a source of primordial density perturbations through Higgs-dependent inflaton decay. By measuring primordial n…
hep-th2018
Connections between Minkowski and Cosmological Correlation Functions
Shek Kit Chu, Mang Hei Gordon Lee, Shiyun Lu +3
We show how cosmological correlation functions of massless fields can be rewritten in terms of Minkowski correlation functions, by extracting symmetry-breaking operators from the c…