Cosmological bound on neutrino masses in the light of H0 tension

Although cosmic microwave background (CMB) is a critical component of cosmological probes of neutrino masses, it has trouble with local direct measurements of H-0, and this is called the H-0 tension. Since neutrino masses are correlated with H-0 in CMB, one can expect the cosmological bound on neutrino masses would be much affected by the H-0 tension. We investigate what impact this tension brings to the cosmological bound on neutrino masses by assuming a model with early recombination in the framework allowing a nonflat Universe which has been shown to resolve the tension. We argue that constraints on neutrino masses become significantly weaker in models where the H-0 tension can be resolved.

Automated summary

The H-0 tension affects the cosmological bound on neutrino masses, with constraints becoming significantly weaker in models where this tension can be resolved.