Speaker
Ujjal Kumar Dey
(IISER Berhampur)
Description
The existence of a rapidly spinning black hole and an ultralight boson capable of forming superradiant cloud around it can provide a non-zero lower bound on fermion couplings with the ultralight bosons. We propose that a manifestation of it in terms of neutrinos can provide a minimal and concrete realization of the mechanism and can produce a diffuse cosmic background of neutrinos. In this talk we try to connect the black hole superradiance and fundamental interactions with this new background and put lower bounds on such scalar and vector interactions.