Studies of muon track reconstruction based on timing and charge in Water Cherenkov Detector

Precise track reconstruction can effectively eliminate isotopic backgrounds around the tracks without requiring anti-coincidence measures across the entire detector. The muon reconstruction in the water buffer region (interlayer water) of the central detector (CD) has not been studied, which called CWB muon.

The CWB muon event number is about 20% of the muons those through the CD. [Purpose] This study aims to measure the mass ordering of neutrinos on the background, veto strategy and effective volume cut. [Methods] This study utilized the earliest photon arrival time and charge information from the photomultiplier tube signals to construct a charge-weighted least squares time equation.