Constraints on neutrino decay lifetime using long-baseline charged and neutral current data

الأصل · EN

We investigate the status of a scenario involving oscillations and decay for charged and neutral current data from the MINOS and T2K experiments. We first present an analysis of charged current neutrino and anti-neutrino data from MINOS in the framework of oscillation with decay and obtain a best fit for non-zero decay parameter α₃. The MINOS charged and neutral current data analysis results in the best fit for |Δm₃₂²| = 2.34× 10⁻³ eV², ² θ₂₃ = 0.60 and zero decay parameter, which corresponds to the limit for standard oscillations. Our combined MINOS and T2K analysis reports a constraint at the 90% confidence level for the neutrino decay lifetime τ₃/m₃ > 2.8 × 10⁻¹² s/eV. This is the best limit based only on accelerator produced neutrinos.