We investigate cosmological bounds on sterile neutrino masses in the light of the Hubble and S8 tensions. We argue that non-zero masses for sterile neutrinos are inferred at 2σ level in some extended models such as varying dark energy equation of state, when a direct measurement of the Hubble constant H0 and weak lensing measurement of dark energy survey (DES) are taken into account. Furthermore, the Hubble and S8 tensions are also reduced in such a framework. We also consider the case where a non-flat Universe is allowed and show that a slightly open Universe may be favored in models with sterile neutrinos in the context of the cosmological tensions.
@article{arxiv.2312.15435,
title = {Constraints on sterile neutrinos and the cosmological tensions},
author = {Supriya Pan and Osamu Seto and Tomo Takahashi and Yo Toda},
journal= {arXiv preprint arXiv:2312.15435},
year = {2024}
}