Four types of neutrino events produced in the large water tank detector and interrelations among them

The Superkamiokande has been analyzing four different types of neutrino events, namely, [1] fully contained events, [2] partially contained events, [3] stopping muon events, and [4] upgoing through muon events, concluding the existence of neutrino oscillation between muon neutrino and tau neutrino. Although the results obtained by the Superkamiokande around neutrino oscillation seems to be clear, the logics of their analysis has never been clarified. We simulate four different types of neutrino events mentoined above in more unified way with more rigourous method in our virtual detector, taking into account stochastic characters of physical processes concerned and clarify interelation among four different types of neutrino events, examining the validity of assertions by the Superkamiokande.