Effect of non-unitary mixing on the mass hierarchy and CP violation determination at the Protvino to Orca experiment

TL;DR

This paper evaluates how non-unitary neutrino mixing affects the ability of the P2O experiment to determine neutrino mass hierarchy and CP violation, providing forecasts and constraints after 6 years of data collection.

Contribution

It introduces the consideration of non-unitary mixing in the analysis of P2O's sensitivity to neutrino properties, which is a novel aspect.

Findings

Non-unitary mixing impacts the sensitivity to mass hierarchy and CP violation.

Forecasts show potential constraints on non-unitary parameters at P2O.

Results highlight the importance of considering non-unitarity in future neutrino experiments.

Abstract

In this paper, we have estimated the neutrino mass ordering and the CP violation sensitivity of the proposed Protvino to Orca (P2O) experiment after 6 years of data-taking. Both unitary and non-unitary $3\times 3$ neutrino mass mixing have been considered in the simulations. A forecast analysis deriving possible future constraints on non-unitary parameters at P2O have been performed.