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相关论文: Predicting Lepton Flavor Mixing from $\Delta(48)$ …

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We consider the $A_4$, $S_4$ and $A_5$ discrete lepton flavour symmetries in the case of 3-neutrino mixing, broken down to non-trivial residual symmetries in the charged lepton and neutrino sectors in such a way that at least one of them is…

高能物理 - 唯象学 · 物理学 2018-07-04 S. T. Petcov , A. V. Titov

We study the contributions of supersymmetric models with a $U(1)$ horizontal symmetry and only spontaneous CP breaking to various lepton flavor observables, such as $\mu \to e\gamma$ and the electron electric dipole moment. We show that…

高能物理 - 唯象学 · 物理学 2021-12-16 Daniel Aloni , Pouya Asadi , Yuichiro Nakai , Matthew Reece , Motoo Suzuki

We consider a scenario with three Majorana neutrinos in which a discrete, finite flavour group G_f is combined with a generalized CP transformation. We derive conditions for consistently defining such a setup. We show that in general lepton…

高能物理 - 唯象学 · 物理学 2013-07-03 Ferruccio Feruglio , Claudia Hagedorn , Robert Ziegler

In the simplest version of a $\mathbf{Q}_{6}$ flavored supersymmetric model, we analyze the leptonic masses and mixings in the framework of a soft breaking of the $\mu \leftrightarrow \tau$ symmetry. This breaking is controlled by the…

高能物理 - 唯象学 · 物理学 2017-10-18 Juan Carlos Gómez-Izquierdo , F. Gonzalez-Canales , M. Mondragón

We investigate a 5d gauge theory on $S^1$ with point interactions. The point interactions describe extra boundary conditions and provide three generations, the charged lepton mass hierarchy, the lepton flavor mixing and tiny degenerated…

高能物理 - 唯象学 · 物理学 2014-12-09 Yukihiro Fujimoto , Kenji Nishiwaki , Makoto Sakamoto , Ryo Takahashi

I review the construction of a model for lepton masses based on the flavour symmetry group A4 x U(1) reproducing the so-called tri-bimaximal lepton mixing scheme, in eccelent agreement with current data. The model predicts a neutrino…

高能物理 - 唯象学 · 物理学 2009-04-25 Ferruccio Feruglio

We present an overview of recent progress in the phenomenological study of neutrino masses, lepton flavor mixing and CP violation. We concentrate on the model-independent properties of massive neutrinos, both in vacuum and in matter.…

高能物理 - 唯象学 · 物理学 2009-11-10 Zhi-zhong Xing

If massive neutrinos are Majorana particles, then the lepton number should be violated in nature and neutrino-antineutrino oscillations $\nu^{}_\alpha \leftrightarrow \overline{\nu}^{}_\beta$ (for $\alpha, \beta = e, \mu, \tau$) will…

高能物理 - 唯象学 · 物理学 2021-12-02 Yilin Wang , Shun Zhou

The recent established large $\theta_{13}$ in neutrino mixing provides an optimistic possibility for the investigation of the CP violation, therefore it is necessary to study the CP-violating phase $\delta_{\rm CP}$ in detail. Based on the…

高能物理 - 唯象学 · 物理学 2014-10-31 Xinyi Zhang , Bo-Qiang Ma

We discuss our recently proposed S3(down)xS3(up) flavour-permutation-symmetric mixing observables, giving expressions for them in terms of (moduli-squared) of the mixing matrix elements. We outline their successful use in providing…

高能物理 - 唯象学 · 物理学 2008-05-23 P. F. Harrison , D. R. J. Roythorne , W. G. Scott

Flavour groups have been extensively used to explain the pattern of mixing in the lepton sector. In combination with generalised CP six observables of the lepton sector can be predicted: three mixing angles and three phases. We present the…

高能物理 - 唯象学 · 物理学 2015-06-24 Jessica Turner

Partial compositeness as a theory of flavor in the lepton sector is assessed. We begin presenting the first systematic analysis of neutrino mass generation in this context, and identifying the distinctive mass textures. We then update the…

高能物理 - 唯象学 · 物理学 2021-01-05 Michele Frigerio , Marco Nardecchia , Javi Serra , Luca Vecchi

We review and clarify some cases of geometrical CP violation, the framework of spontaneous CP violation through complex phases with values that are independent of parameters of the potential. We present a flavour model based on Delta(27)…

高能物理 - 唯象学 · 物理学 2013-02-19 Ivo de Medeiros Varzielas

We perform an exhaustive analysis of all possible breaking patterns arising from $S_4\rtimes H_{CP}$ in a new {\it tri-direct CP approach} to the minimal seesaw model with two right-handed neutrinos, and construct a realistic flavour model…

高能物理 - 唯象学 · 物理学 2019-05-08 Gui-Jun Ding , Stephen F. King , Cai-Chang Li

Flavour symmetries have been used to constrain both quark and lepton mixing parameters. In particular, they can be used to completely fix the mixing angles. For the lepton sector, assuming that neutrinos are Majorana particles, we have…

高能物理 - 唯象学 · 物理学 2014-10-16 Renato M. Fonseca , Walter Grimus

A simple breaking of the subnuclear democracy of the quarks leads to a mixing between the second and the third family, in agrement with observation. Introducing the mixing between the first and the second family, one finds an interesting…

高能物理 - 唯象学 · 物理学 2007-05-23 Harald Fritzsch

We perform a comprehensive analysis of the phenomenology of leptonic low and high energy CP phases in a scenario with three heavy right-handed neutrinos in which a flavor and a CP symmetry are non-trivially broken. All CP phases as well as…

高能物理 - 唯象学 · 物理学 2017-04-26 Claudia Hagedorn , Emiliano Molinaro

We construct two flavor models based on $S_4$ family symmetry and generalised CP symmetry. In both models, the $S_4$ family symmetry is broken down to the $Z^{SU}_2$ subgroup in the neutrino sector, as a consequence, the trimaximal…

高能物理 - 唯象学 · 物理学 2014-02-19 Cai-Chang Li , Gui-Jun Ding

We propose a theory for fermion masses and mixings in which an $A_4$ family symmetry arises naturally from a six-dimensional spacetime after orbifold compactification. The flavour symmetry leads to the successful "golden" quark-lepton…

高能物理 - 唯象学 · 物理学 2020-01-10 Francisco J. de Anda , José W. F. Valle , Carlos A. Vaquera-Araujo

Current neutrino oscillation data indicate that the 3x3 lepton flavor mixing matrix V is likely to be symmetric about its V_{e3}-V_{\mu 2}-V_{\tau 1} axis. This off-diagonal symmetry corresponds to three pairs of {\it congruent} unitarity…

高能物理 - 唯象学 · 物理学 2009-11-07 Zhi-zhong Xing