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Almost general analysis of CKM and MNS matrices for hierarchical Yukawa structure and interpretation of Dirac CP phase probed by DUNE and T2HK
Physics Letters B ( IF 4.3 ) Pub Date : 2024-12-03 , DOI: 10.1016/j.physletb.2024.139169
Masaki J.S. Yang

In this letter, we perform an almost general analysis of flavor-mixing matrices VCKM and UMNS 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 VCKM and UMNS, the intrinsic CP phase δd,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 su,e of more hierarchical fermions. For sufficiently small 1-2 mixing se of charged leptons, the Dirac phase δ is mostly identical to the intrinsic phase of neutrinos δν. Therefore, future detection of the Dirac phase indicates the observation of δν. On the other hand, if such a CP violation is not observed, an upper limit is placed on a combination of δν and relative phases.

中文翻译:


对 CKM 和 MNS 矩阵的分层 Yukawa 结构进行几乎一般的分析,并通过 DUNE 和 T2HK 探测对 Dirac CP 相的解释



在这封信中,我们对风味混合矩阵 VCKM 和 UMNS 进行了几乎一般的分析,以通过下一代中微子振荡实验研究 CP 相的判别能力。作为近似值,我们忽略了对角化的 1-3 混合,以获得更分层的费米子 u,e。因此,在 VCKM 和 UMNS 中有两个 CP 违规来源,即层次较少的费米子 d,ν 对角化的本征 CP 相 δd,ν 和两个酉矩阵之间的相对相。通过消除非物理相并施加三个测量混合角度的约束,风味混合矩阵由两个相和更分层费米子的 1-2 混合 su,e 解析显示。对于足够小的带电轻子的 1-2 混合 se,狄拉克相 δ 与中微子 δν 的本征相基本相同。因此,未来检测到 Dirac 相表明观察到 δν。另一方面,如果未观察到此类 CP 违规,则对 δν 和相对相的组合设置上限。
更新日期:2024-12-03
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