Zobrazeno 1 - 10
of 333
pro vyhledávání: '"Zhi-Zhong Xing"'
Autor:
Zhi-zhong Xing
Publikováno v:
Nuclear Physics B, Vol 1008, Iss , Pp 116723- (2024)
The Casas-Ibarra (CI) parametrization of the Yukawa coupling matrix of Majorana neutrinos is generalized by considering the exact seesaw relation and including non-unitarity of the 3×3 Pontecorvo-Maki-Nakagawa-Sakata (PMNS) flavor mixing matrix. Wit
Externí odkaz:
https://doaj.org/article/03a256ca15984419bf50443baf4adc85
Autor:
Zhi-zhong Xing
Publikováno v:
Physics Letters B, Vol 856, Iss , Pp 138909- (2024)
We present the first complete calculation of the Jarlskog invariant, a working measure of the strength of CP violation in the flavor oscillations of three light neutrino species, with the help of a full Euler-like block parametrization of the flavor
Externí odkaz:
https://doaj.org/article/fb4e22a80c0044e6816699558d0f5767
Autor:
Shu Luo, Zhi-zhong Xing
Publikováno v:
Nuclear Physics B, Vol 997, Iss , Pp 116381- (2023)
We find that the precision and accuracy of current experimental data on the moduli of nine Cabibbo-Kobayashi-Maskawa (CKM) quark flavor mixing matrix elements allow us to numerically determine the correct size of the Jarlskog invariant of CP violatio
Externí odkaz:
https://doaj.org/article/d1a4ef43602b401299f6b76511a571ee
Autor:
Shu Luo, Zhi-zhong Xing
Publikováno v:
Physics Letters B, Vol 845, Iss , Pp 138142- (2023)
The probabilities of νμ→νe and ν‾μ→ν‾e oscillations in vacuum are determined by the CP-conserving flavor mixing factors Rij≡Re(UμiUejUμj⁎Uei⁎) and the universal Jarlskog invariant of CP violation Jν≡(−1)i+jIm(UμiUejUμj⁎
Externí odkaz:
https://doaj.org/article/3044b663d91b4258bdcceddc2b9ac485
Autor:
Zhi-zhong Xing
Publikováno v:
Physics Letters B, Vol 844, Iss , Pp 138065- (2023)
With the help of a block parametrization of the canonical seesaw flavor textures in terms of the Euler-like rotation angles and CP-violating phases, we derive a general and explicit expression for the Jarlskog invariant of CP violation in neutrino os
Externí odkaz:
https://doaj.org/article/840c77f994784517be66c15b28aca2bc
Autor:
Zhi-zhong Xing
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 6, Pp 1-16 (2022)
Abstract In the canonical seesaw framework flavor mixing and CP violation in weak charged-current interactions of light and heavy Majorana neutrinos are correlated with each other and described respectively by the 3 × 3 matrices U and R. We show tha
Externí odkaz:
https://doaj.org/article/2208af653fc84134b66e4973db9ba407
Autor:
Zhi-zhong Xing
Publikováno v:
Nuclear Physics B, Vol 987, Iss , Pp 116106- (2023)
We reformulate the canonical seesaw mechanism in the case that the electroweak gauge symmetry is unbroken, and show that it can formally work and allow us to derive an exact seesaw formula for the light and heavy Majorana neutrinos. We elucidate the
Externí odkaz:
https://doaj.org/article/3aeb7ea8bbbb42a09a55a7bf328270f0
Autor:
Zhi-zhong Xing, Di Zhang
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 12, Pp 1-15 (2020)
Abstract We calculate the rates of radiative $$\beta ^- \rightarrow \alpha ^- + \gamma $$ β - → α - + γ decays for $$(\alpha , \beta ) = (e, \mu )$$ ( α , β ) = ( e , μ ) , $$(e, \tau )$$ ( e , τ ) and $$(\mu , \tau )$$ ( μ , τ ) by taking
Externí odkaz:
https://doaj.org/article/75dc4ddf7e41476f812760049bbe5d4b
Autor:
Zhi-zhong Xing, Di Zhang
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 4, Pp 1-16 (2020)
Abstract In the type-I seesaw mechanism the Casas-Ibarra (CI) parametrization provides a convenient description of the Dirac neutrino mass matrix in terms of the light and heavy Majorana neutrino masses, the lepton flavor mixing matrix U and an unkno
Externí odkaz:
https://doaj.org/article/124ef66ce4504df3953f105d7190278e
Publikováno v:
Nuclear Physics B, Vol 974, Iss , Pp 115634- (2022)
We calculate the quark flavor mixing matrix V based on the Hermitian quark mass matrices Mu and Md with vanishing (1,1), (1,3) and (3,1) entries. The popular leading-order prediction |Vub/Vcb|≃mu/mc is significantly modified, and the result agrees
Externí odkaz:
https://doaj.org/article/f50a541bbda34caead336308382d675e