Search for the differences in Atmospheric Neutrinos and Antineutrinos oscillation parameters at the INO-ICAL Experiment

Abstract

In this paper, we present a study to measure the differences between the atmospheric neutrino and anti-neutrino oscillations in the Iron-Calorimeter detector at the India-based Neutrino Observatory experiment. Charged Current $ν_μ$ and $\overlineν_μ$ interactions with the detector under the influence of earth matter effect have been simulated for ten years of exposure. The observed $ν_μ$ and $\overlineν_μ$ events spectrum are separately binned into direction and energy bins, and a $χ^{2}$ is minimised with respect to each bin to extract the oscillation parameters for $ν_μ$ and $\overlineν_μ$ separately. We then present the ICAL sensitivity to confirm a non-zero value of the difference in atmospheric mass squared of neutrino and anti-neutrino i.e. $|Δm^{2}_{32}|-|Δ\overline{m^{2}}_{32}|$.