Bounds on Exotic Couplings from a New $\nu$-Background

TL;DR

This paper introduces a novel neutrino background from black hole superradiance, establishing lower bounds on scalar and vector couplings through theoretical analysis of fermionic production mechanisms.

Contribution

It presents the first analysis of a neutrino background from quenched superradiance and derives lower bounds on associated scalar and vector couplings.

Findings

Lower bounds on scalar couplings established

Lower bounds on vector couplings established

Neutrino background from black hole superradiance proposed

Abstract

We propose a hitherto unexplored neutrino background emerging from the mechanism of quenched superradiance of rotating primordial black holes. The quenching of the phenomenon happens through fermionic production, in our case neutrino production, from the boson cloud formed due to superradiance. The couplings involved in these interactions are bounded from above through several studies. In this work we put lower bounds on such scalar and vector couplings.