Intrinsic and extrinsic CP violation in long-baseline neutrino experiments

Abstract

The observation of CP violation in the long-baseline (LBL) neutrino experiments is complicated by the matter effects, wherein apart from the intrinsic/genuine CP violation the possibility of extrinsic/fake CP violation is also there. Using exact expressions of transition probabilities, we study the dependence of genuine and fake components of CP violation asymmetry on baseline length [Formula: see text] and neutrino energy [Formula: see text]. We examine the ongoing LBL experiments T2K, NO[Formula: see text]A and the next-generation experiment T2HK for their sensitivity towards genuine and fake components of CP violation and propose an experimental setup which not only has a very high CP discovery potential but also has well-separated sensitivities in matter and vacuum. In addition, the proposed setup facilitates the hierarchy and octant determination due to prominent matter effects.