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Of the remaining unknown parameters of neutrinos, the leptonic CP phases are of profound importance by providing a window for us to understand why matter exists in the Universe. I will talk about some phenomenological studies on the leptonic CP phases, both Dirac and Majorana types. The Dirac part introduces an improved CP measurement configuration TNT2K (Tokai and Toyama to Kamioka) with muon decay at rest (muDAR) to solve five-fold intrinsic problems in accelerator based experiments like T2K, NOvA, and DUNE. The Majorana part will show the possibility of constraining the two Majorana CP phases simultaneously. We will enter a new era of precision measurement on leptonic CP phases that can tell us the deep secrets of nature. |
