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. In this model, active neutrinos resonantly convert to self-interacting dark radiation after BBN but before the CMB epoch. It yields cosmological signatures equivalent to those of self-interacting neutrinos and naturally accommodates relaxed neutrino mass constraints. Our analysis shows that Planck + DESI data prefer strongly interacting DR to $\Lambda$CDM, while remaining consistent with all other laboratory and BBN constraints.
Author
Dr
Subhajit Ghosh
(The University of Texas at Austin)