Cosmological implications of the KATRIN experiment

TL;DR

The paper explores how the upcoming KATRIN neutrino experiment's potential measurements of neutrino mass could significantly influence cosmological parameter estimates, affecting conclusions about universe properties.

Contribution

It analyzes the impact of KATRIN's neutrino mass constraints on cosmological parameters under different scenarios, highlighting the interplay between particle physics and cosmology.

Findings

KATRIN's measurements will influence the significance of n_s<1.

Results will affect estimates of the cosmological constant Ω_Λ.

Neutrino mass constraints alter key cosmological inferences.

Abstract

The upcoming Karlsruhe Tritium Neutrino (KATRIN) experiment will put unprecedented constraints on the absolute mass of the electron neutrino, $\mnue$. In this paper we investigate how this information on $\mnue$ will affect our constraints on cosmological parameters. We consider two scenarios; one where $\mnue=0$ (i.e., no detection by KATRIN), and one where $\mnue=0.3$eV. We find that the constraints on $\mnue$ from KATRIN will affect estimates of some important cosmological parameters significantly. For example, the significance of $n_s<1$ and the inferred value of $\Omega_\Lambda$ depend on the results from the KATRIN experiment.