Title: Non-Gaussianities in the PBH Formation and Induced GWs

Speaker: Shi Pi (Institute of Theoretical Physics, CAS)

Time: 10:30 am, May 9th，2024

Venue: C302, New Science Building

Abstract: I will briefly review the recent progress in the non-Gaussian effect on the primordial black hole formation and the induced GWs.The most promising mechanism of generating PBHs is by the enhancement of power spectrum of the primordial curvature perturbation, which is usually accompanied by the the enhancement of non-Gaussianity that crucially changes the abundance of PBHs. I will discuss how non-Gaussianity is generated in single field inflation as well as in the curvaton scenario, and then discuss how to calculate PBH mass function with such non-Gaussianities. I also show non-Gaussianity only has mild effects on the induced gravitational waves (GWs), which gives robust predictions in the mHz and nHz GW experiments.

Ref: 2404.06151