Cosmological Collider Signals from Right-Handed Neutrino Loops
Supernova cooling provides a powerful probe of physics beyond the Standard Model (SM), in particular for new, light states interacting feebly with SM particles. Unlike previous supernova studies focusing on annihilation or bremsstrahlung, we identify neutrino-initiated conversion as a dominant and previously unexplored production channel for fermionic dark matter (DM) via the...
The detection of gravitational waves has created a pressing need for high-precision theoretical models for binary systems. In this talk, I will review recent progress in the analytic computation of physical observables for binary black hole and neutron star systems using modern on-shell methods. I will focus on how the on-shell methods, which focus directly on gauge-invariant observables,...
There have been increasing activities recently in the studies of cosmological collider physics and cosmological correlators, attracting attentions from particle physics, observational cosmology, and amplitude communities alike. We will review some recent progress in this direction.
