Correlation functions of primordial fluctuations provide us an exciting avenue into the physics with extremely high energy in the very early Universe. Recently the bootstrap approach has offered new perspectives and powerful tools to study these cosmological correlators. In this talk, by incorporating the latest developments, I will “bootstrap” two types of correlators generated by boost-breaking interactions during inflation, which are most relevant for the next-generation observations. The first one is the contact correlators arising from higher-derivative self-interactions of the inflaton. The second is the cosmological collider physics, where the masses and spins of heavy particles leave unique imprints in the scalar bispectra. Since the boost symmetries are broken in our consideration, the signals of non-Gaussianity are boosted to be detectable for near-future experiments. Furthermore through the bootstrap approach, we derive for the first time not only a complete set of these correlators systematically, but also their full shape information analytically. 

 

　　Contact联系人  王少江