Neutrino Mass Bounds from Neutrinoless Double Beta Decays and Large Scale Structures

TL;DR

This paper combines cosmological data and neutrinoless double beta decay experiments to constrain the total neutrino mass, exploring models with dynamic neutrino masses influenced by dark energy, and discusses future prospects with weak-lensing.

Contribution

It provides updated neutrino mass bounds from cosmological and decay data within standard and interacting dark energy models, including future outlooks.

Findings

Neutrino mass sum constrained to < 0.87 eV at 95% CL

Consistent bounds within flat ΛCDM and interacting models

Future weak-lensing observations could improve constraints

Abstract

We investigate the way how the total mass sum of neutrinos can be constrained from the neutrinoless double beta decay and cosmological probes with cosmic microwave background (WMAP 3-year results), large scale structures including 2dFGRS and SDSS data sets. First we discuss, in brief, on the current status of neutrino mass bounds from neutrino beta decays and cosmic constrain within the flat $\Lambda CMD$ model. In addition, we explore the interacting neutrino dark-energy model, where the evolution of neutrino masses is determined by quintessence scalar filed, which is responsable for cosmic acceleration today. Assuming the flatness of the universe, the constraint we can derive from the current observation is $\sum m_{\nu} < 0.87$eV at the 95 % confidence level, which is consistent with $\sum m_{\nu} < 0.68$eV in the flat $\Lambda CDM$ model. Finally we discuss the future prospect of the neutrino mass bound with weak-lensing effects.