On the role of the ντ appearance in DUNE in constraining standard neutrino physics and beyond

Abstract

We consider the ν µ → ν τ appearance channel in the future Deep Underground Neutrino Experiment (DUNE) which offers a good statistics of the ν τ sample. In order to measure its impact on constraining the oscillation parameters, we consider several assumptions on the efficiency for ν τ charged-current signal events (with subsequent τ → e decay) and the related backgrounds and study the effects of various systematic uncertainties. Two different neutrino fluxes have been considered, namely a CP-violation optimized flux and a ν τ optimized flux.Our results show that the addition of the ν µ → ν τ appearance channel does not reduce the current uncertainties on the standard 3-ν oscillation parameters while it can improve in a significant way the sensitivity to the Non-Standard Interaction parameter | µτ | and to the new mixing angle θ 34 of a sterile neutrino model of the 3 + 1 type.

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Neutrino oscillation phenomenology in the standard model and beyond

“…This possibility has been recently discussed in Ref. [291,292]. If neutrinos are quasi-Dirac particles, β P αβ < 1, with β = {e, µ, τ }.…”

Neutrino non-standard interactions: A status report

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