Speaker
Dr
Subhajit Ghosh
(The University of Texas at Austin)
Description
In this talk, I will discuss a novel way of modeling neutrino self-interactions for cosmological observables. The mechanism relies on the fact that neutrinos and dark radiation, having the same abundance and free-streaming properties, are indistinguishable in low-energy cosmological probes. The minimal proof-of-principle model naturally accommodates relaxed neutrino mass constraint and mimics strong neutrino self-interactions. The model is safe from laboratory and BBN bounds.
