Neutrino Mass Hierarchy and CP Violation in Long Baseline Neutrino Experiment

Abstract

We discuss the CP violation in long base line neutrino oscillation experiments. The direct measurement of CP violation is the difference of transitions probability between CP conjugate channels. The sign of Δ31 is not yet determined, we assume two mass hierarchy conditions, normal (Δ31>0) and inverted (Δ31<0). In this paper, we study the CP violation and neutrino mass hierarchy effect in vacuum and matter for long baseline BNL experiments. By an appropriate chose of experimental parameter, neutrino energy and traveled distance. We find that, in matter normal mass hierarchy en-chanced maximum CP violation over their invert mass hierarchy value by 12 %.