首页/论文/2005.04023

arXiv 2005.040232020-05hep-ph

Neutrino Mixing by modifying the Yukawa coupling structure of constrained sequential dominance

Joy Ganguly, Raghavendra Srikanth Hundi

备注：: 27 pages, 1 figure; corrected our model; added 1 section, 2 appendices and references; conclusions unchanged; accepted by PRD
发表信息：: Phys. Rev. D 103, 035007 (2021)
DOI：: 10.1103/PhysRevD.103.035007

英文摘要：

In the constrained sequential dominance (CSD), tri-bimaximal mixing (TBM) pattern in the neutrino sector has been explained, by proposing a certain Yukawa coupling structure for the right-handed neutrinos of the model. However, from the current experimental data it is known that the values of neutrino mixing angles are deviated from the TBM values. In order to explain this neutrino mixing, we first propose a phenomenological model where we consider Yukawa couplings which are modified from that of CSD. Essentially, we add small complex parameters to the Yukawa couplings of CSD. Using these modified Yukawa couplings, we demonstrate that neutrino mixing angles can deviate from their TBM values. We also construct a model, based on a flavor symmetry, in order to justify the modified form of Yukawa couplings of our work.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

阅读原文

阅读 PDF ↗

arXiv 页面 ↗HTML 原文 ↗

本文内容

英文摘要相关论文

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

继续探索

相关论文

Neutrino Mixing from the Charged Lepton Sector with Sequential Right-Handed Lepton Dominance

We systematically analyze the possibility that bi-large lepton mixing originates from the charged lepton sector in models with sequential dominance for the right-handed charged leptons. We derive analytical expressions for the mixing angles and CP phases of the MNS matrix for the case of zero mixing from the neutrino sector, which is arranged for with the help of sequential dominance for the right-handed neutrinos. For small $θ_{13}$, the two large mixing angles $θ_{12}$ and $θ_{23}$ are determined by the Yukawa couplings to the dominant right-handed tau. The mixing angle $θ_{13}$ is then gove…

2004-03-04hep-ph

Bi-large Neutrino Mixing and Mass of the Lightest Neutrino from Third Generation Dominance in a Democratic Approach

We show that both small mixing in the quark sector and large mixing in the lepton sector can be obtained from a simple assumption of universality of Yukawa couplings and the right-handed neutrino Majorana mass matrix in leading order. We discuss conditions under which bi-large mixing in the lepton sector is achieved with a minimal amount of fine-tuning requirements for possible models. From knowledge of the solar and atmospheric mixing angles we determine the allowed values of sin θ_{13}. If embedded into grand unified theories, the third generation Yukawa coupling unification is a generic fea…

2004-10-02hep-ph

Embedding the Zee-Wolfenstein neutrino mass matrix in an SO(10) x A4 GUT scenario

We consider renormalizable SO(10) Yukawa interactions and put the three fermionic 16-plets into the 3-dimensional irreducible A_4 representation. Scanning the possible A_4 representation assignments to the scalars, we find a unique case which allows to accommodate the down-quark and charged-lepton masses. Assuming type II seesaw dominance, we obtain a viable scenario with the Zee-Wolfenstein neutrino mass matrix, i.e., the Majorana mass matrix with a vanishing diagonal. Contributions from the charged-lepton mass matrix resolve the well-known problems with lepton mixing arising from the vanishi…

2008-02-16hep-ph

Testing constrained sequential dominance models of neutrinos

Constrained sequential dominance (CSD) is a natural framework for implementing the see-saw mechanism of neutrino masses which allows the mixing angles and phases to be accurately predicted in terms of relatively few input parameters. We analyze a class of CSD($n$) models where, in the flavour basis, two right-handed neutrinos are dominantly responsible for the "atmospheric" and "solar" neutrino masses with Yukawa couplings to $(ν_e, ν_μ, ν_τ)$ proportional to $(0,1,1)$ and $(1,n,n-2)$, respectively, where $n$ is a positive integer. These coupling patterns may arise in indirect family symmetry …

2015-10-12hep-ph

Lepton Flavour Violation in the Constrained MSSM with Natural Neutrino Mass Hierarchy

We present predictions for $μ\to e γ$ and $τ\to μγ$ in the CMSSM in which there is a natural hierarchy of neutrino masses resulting from the sequential dominance of three right-handed neutrinos. We perform a global analysis of this model in the $(m_0,M_{1/2})$ plane, assuming radiative electroweak symmetry breaking, and including all observed laboratory data. We confirm that a large (small) $τ\to μγ$ rate results from the dominant right-handed neutrino being the heaviest (lightest) one. We show that the $μ\to e γ$ rate may determine the order of the sub-dominant neutrino Yukawa couplings in th…

2003-04-30hep-ph

Asymptotic behavior and critical coupling in the scalar Yukawa model from Schwinger-Dyson equations

A sequence of $n$-particle approximations for the system of Schwinger-Dyson equations is investigated in the model of a complex scalar field $ϕ$ and a real scalar field $χ$ with the interaction $gϕ^*ϕχ$. In the first non-trivial two-particle approximation, the system is reduced to a system of two nonlinear integral equations for propagators. The study of this system shows that for equal masses a critical coupling constant $g^2_c$ exists, which separates the weak- and strong-coupling regions with the different asymptotic behavior for deep Euclidean momenta. In the weak-coupling region ($g^2<g^2…

2013-04-29hep-phhep-thnucl-th

更多相关论文收起更多论文

Large Top Mass and Non-Linear Representation of Flavour Symmetry

We consider an effective theory (ET) approach to flavour-violating processes beyond the Standard Model (SM), where the breaking of flavour symmetry is described by spurion fields whose low-energy vacuum expectation values are identified with the SM Yukawa couplings. Insisting on canonical mass dimensions for the spurion fields, the large top-quark Yukawa coupling also implies a large expectation value for the associated spurion, which breaks part of the flavour symmetry already at the UV scale Lambda of the ET. Below that scale, flavour symmetry in the ET is represented in a non-linear way by …

2008-01-11hep-phhep-th

Neutrino Masses and Mixing Angles in a Realistic String-Inspired Model

We analyse a supersymmetric string-inspired model of all fermion masses and mixing angles based on the Pati-Salam $SU(4)\times SU(2)_L \times SU(2)_R$ gauge group supplemented by a $U(1)_X$ flavour symmetry. The model involves third family Yukawa unification and predicts the top mass and the ratio of the vacuum expectation values $\tan β$. The model also provides a successful description of the CKM matrix and predicts the masses of the down and strange quarks. However our main focus is on the neutrino masses and MNS mixing angles, and we show how the recent atmospheric neutrino mixing observed…

2000-09-28hep-ph

相交 D6 膜的超对称 Pati-Salam 景观中的超对称破缺软项

Susy breaking soft terms in the supersymmetric Pati-Salam landscape from Intersecting D6-Branes

本文研究了IIA型弦理论中相交D6膜产生的三族Pati-Salam模型的超对称破缺软项，发现在特定场景下软项与Yukawa耦合无关，且对偶模型软项仅在部分参数匹配，特定极限下存在普适质量。

2024-12-17hep-phhep-th

Discriminating Neutrino See-Saw Models

We consider how well current theories can predict neutrino mass and mixing parameters, and construct a statistical discriminator which allows us to compare different models to each other. As an example we consider see-saw models based on family symmetry, and single right-handed neutrino dominance, and compare them to each other and to the case of neutrino anarchy with random entries in the neutrino Yukawa and Majorana mass matrices. The predictions depend crucially on the range of the undetermined coefficients over which we scan, and we speculate on how future theories might lead to more preci…

2001-08-09hep-exhep-ph

右手中微子：跷跷板模型与实验信号

Right-handed neutrinos: seesaw models and signatures

本文教学性介绍右手中微子这一标准模型扩展，梳理单/三个右手中微子跷跷板机制、级联主导与简并质量情形的特性，还讨论额外单态中微子的双/反跷跷板效应及相关实验信号。

2025-09-05hep-ph