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81 papers · 1 filter
Rephasing Invariant Formula for CP Phase in Kobayashi-Maskawa Parametrization and Exact Sum Rule with Unitarity Triangle
Masaki J. S. Yang
In this letter, we obtain a rephasing invariant formula for the CP phase in the Kobayashi--Maskawa parameterization $δ_{\rm KM} = \arg [ - { V_{ud} \det V_{\rm CKM} / V_{us} V_{ub}…
Chiral perturbative relation for neutrino masses in the type-I seesaw mechanism
Masaki J. S. Yang
In this letter, we perform a perturbative analysis by the lightest singular value of the Dirac mass matrix in the type-I seesaw mechanism. A mass relation $M_{1} =…
Chiral perturbative analysis for an almost massless neutrino in the type-I seesaw mechanism
Masaki J. S. Yang
In this paper, we perform chiral perturbative analysis of an approximate lepton number symmetry associated with a sufficiently light neutrino in the type-I seesaw mechanism. For th…
Search for Lepton Flavor Violating Decay at FASER
Takeshi Araki, Kento Asai, Hidetoshi Otono +2
FASER is one of the promising experiments which search for long-lived particles beyond the Standard Model. In this paper, we consider charged lepton flavor violation (CLFV) via a l…
Asymmetric Mediator in Scotogenic Model
Kento Asai, Yuhei Sakai, Joe Sato +2
The scotogenic model is the Standard Model (SM) with Z_2 symmetry and the addition of Z_2 odd right-handed Majorana neutrinos and SU(2)_L doublet scalar fields. We have extended th…
Determination of coupling patterns by parallel searches for and in muonic atoms
Joe Sato, Kohei Sugawara, Yuichi Uesaka +1
We investigate a possibility that the conversion is discovered prior to the conversion, and its implications to the new physics search. We focus on the sp…