Sensitivity of the CP-Violation Phase Measurement in the Lepton Sector in the P2O Experiment

Abstract

In the scope of the P2O (Protvino-to-ORCA) experiment it is planned to carry out experiments to determine the neutrino mass hierarchy and to search for the CP-violation in the lepton sector. Previously, various options of neutrino channels at the U-70 accelerator were considered for these experiments. In this paper, the neutrino beams formed in these channels are considered; their characteristics are compared. Different types of uncertainties in the experiment are examined, and their contributions to the measurement error of the CP-violation phase and their comparative analysis is carried out. This will allow further shaping the optimal architecture of planned long-baseline experiments (that is, determining the type and characteristics of the beam and detectors, as well as the required intensity of the experiment) at the qualitative level. In addition to that, in this work we calculate the sensitivity of the P2O experiment to the measurement of the CP-violation phase using each of the neutrino beams considered earlier. The choice of the optimal channel option, which allows ensuring the maximum sensitivity of the P2O experiment to the planned measurements, is performed.