A rephasing invariant formula for the Dirac CP phase and general perturbative expansion: Prospects for DUNE and T2HK

We present a formula for the Dirac CP phase δ=arg(Ue1Ue2Uμ3Uτ3/Ue3detUMNS), directly derived from the lepton mixing matrix in an arbitrary basis of phases. In contrast to the numerically suppressed Jarlskog invariant, this expression is computationally simple and less sensitive to approximations. We...

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Bibliographic Details
Main Author: Masaki J.S. Yang
Format: Article
Language:English
Published: Elsevier 2025-09-01
Series:Physics Letters B
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269325005453
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