Speaker
Description
The consequences of introducing matter effects into the neutrino visible decay scheme are studied. To this end, we select two
baselines for which matter effects have to be considered:1300 km (DUNE) and 7650 km(considering an hypothetical
beam aimed towards ANDES). The matter effects are almost unnoticeable for the visible decay contribution DUNE, being sizable at ANDES. We also carry out a realistic analysis taking DUNE as a context, considering $\nu_\mu$ disappearance and $\nu_e$ appearance channels, for both FHC and RHC modes. The sensitivity to the decay constant $\alpha_3$ can be as low as $2 \times 10^{-6}$ eV$^2$ at $90 \%$ C.L., depending on the neutrino masses and type of coupling (scalar, pseudo-scalar or both). Lastly, we asses the impact of neutrino decay in the determination of $\theta_{23}$ and $\delta_{CP}$, and find that the best-fit value of $\theta_{23}$ can move from a true value at the lower octant towards the higher octant.
| arXiv | arXiv:1805.03279 [hep-ph] |
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