Invisible neutrino decay in the light of NOvA and T2K data

Understand

We probe for evidence of invisible neutrino decay in the latest NOvA and T2K data.

• It is seen that both NOvA and T2K data sets are better fitted when one allows for invisible neutrino decay.
• We consider a scenario where only the third neutrino mass eigenstate $\nu_3$ is unstable and decays into invisible components.
• The best-fit value for the $\nu_3$ lifetime is obtained as $\tau_{3}/m_{3} = 3.16\times 10^{-12}$ s/eV from the analysis of the NOvA neutrino data and $\tau_{3}/m_{3} = 1.0\times 10^{-11}$ s/eV from the analysis of the T2K neutrino and anti-neutrino data.