Study of neutrino oscillation parameters at the INO-ICAL detector using event-by-event reconstruction

We present the reach of the proposed INO-ICAL in measuring the atmospheric-neutrino-oscillation parameters \(\theta_{23}\) and \(\Delta m^2_{32}\) using full event-by-event reconstruction for the first time. We also study the fluctuations in the data and their effect on the precision measurements and mass-hierarchy analysis for a five-year exposure of the 50 kton ICAL detector. We find a mean resolution of \(\Delta\chi^2 \approx 2.9\), which rules out the wrong mass hierarchy of the neutrinos with a significance of approximately \(1.7\sigma\). These results are similar to those to presented earlier studies that approximated the performance of the ICAL detector.