Almost general analysis of CKM and MNS matrices for hierarchical Yukawa structure and interpretation of Dirac CP phase probed by DUNE and T2HK
Year: 2024
Type: article
Abstract: In this letter, we perform an almost general analysis of flavor-mixing matrices V CKM and U MNS to investigate the discriminative power of CP phases by next-generation neutrino oscillation experiments. As an approximation, we neglect the 1-3 mixing of diagonalization for more hierarchical fermions u , e . Thus there are two sources of CP violation in V CKM and U MNS , the intrinsic CP phase δ d , ν in diagonalization of less hierarchical fermions d , ν and relative phases between two unitary matrices. By eliminating unphysical phases and imposing constraints of the three measured mixing angles, the flavor-mixing matrices are analytically displayed by two phases and the 1-2 mixing s u , e of more hierarchical fermions. For sufficiently small 1-2 mixing s e of charged leptons , the Dirac phase δ is mostly identical to the intrinsic phase of neutrinos δ ν . Therefore, future detection of the Dirac phase indicates the observation of δ ν . On the other hand, if such a CP violation is not observed, an upper limit is placed on a combination of δ ν and relative phases.
Source: Physics Letters B
Author: Masaki J.S. Yang
Institution: Saitama University
Language: English
Topic: Neutrino Physics Research
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4404959744