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We further study the "complementary" Ansatz, Tr$(M_\nu)$=0, for a prediagonal light Majorana type neutrino mass matrix. Previously, this was studied for the CP conserving case and the case where the two Majorana type CP violating phases…

高能物理 - 唯象学 · 物理学 2009-11-10 Samina S. Masood , Salah Nasri , Joseph Schechter

Within the broad context of quark-lepton unification, we investigate the implications of broken continuous family symmetries which result from requiring that in the limit of exact symmetry, the Dirac mass matrices yield hierarchical masses…

高能物理 - 唯象学 · 物理学 2010-10-27 Lisa Everett , Pierre Ramond

The Standard Model lacks an organizing principle to describe quark and lepton ``flavours''. Neutrino oscillation experiments show that leptons mix very differently from quarks, adding a major challenge to the flavour puzzle. We briefly…

高能物理 - 唯象学 · 物理学 2025-02-04 Gui-Jun Ding , Jose W. F. Valle

We perform a systematical and analytical study of lepton mixing which can be derived from the subgroups of $SU(3)$ under the assumption that neutrinos are Dirac particles. We find that type D groups can predict lepton mixing patterns…

高能物理 - 唯象学 · 物理学 2015-12-02 Chang-Yuan Yao , Gui-Jun Ding

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

We investigate models of charged lepton and neutrino masses and lepton mixing based on broken modular symmetry. The matter fields in these models are assumed to transform in irreducible representations of the finite modular group $\Gamma_4…

高能物理 - 唯象学 · 物理学 2019-05-01 P. P. Novichkov , J. T. Penedo , S. T. Petcov , A. V. Titov

We consider minimal modifications to tribimaximal (TBM) mixing matrix which accommodate non-zero mixing angle $\theta_{13}$ and CP violation. We derive four possible forms for the minimal modifications to TBM mixing in a model with $A_4$…

高能物理 - 唯象学 · 物理学 2015-04-16 Sin Kyu Kang , Morimitsu Tanimoto

Under the assumption that the $2\leftrightarrow 3$ symmetry is broken only through phases, we give a systematical investigation of possible lepton mass matrix forms without referring to the explicit parameter values. The two types of the…

高能物理 - 唯象学 · 物理学 2008-11-26 Yoshio Koide , Eiichi Takasugi

In view of the precise measurement of the leptonic mixing angle \theta_{13}, implications of the latest mixing data have been investigated for lepton mass matrices pertaining to Dirac neutrinos.These texture specific lepton mass matrices…

高能物理 - 唯象学 · 物理学 2014-10-28 Priyanka Fakay , Samandeep Sharma

Recent neutrino data have been favourable to a nearly bimaximal mixing, which suggests a simple form of the neutrino mass matrix. Stimulated by this matrix form, a possibility that all the mass matrices of quarks and leptons have the same…

高能物理 - 唯象学 · 物理学 2009-11-07 Yoshio Koide , Hiroyuki Nishiura , Koichi Matsuda , Tatsuru Kikuchi , Takeshi Fukuyama

We re-analyze charged lepton corrections to neutrino mixing angles and CP phases, carefully including CP phases from the charged lepton sector. We present simple analytical formulae for including the charged lepton corrections and derive…

高能物理 - 唯象学 · 物理学 2010-04-05 Stefan Antusch , Steve F. King

Taking into account the latest neutrino oscillation data, we study texture zeros of the lepton mass matrices. Assuming the Dirac neutrino mass matrix M_D, the charged-lepton mass matrix M_l and the mass matrix of heavy right-handed Majorana…

高能物理 - 唯象学 · 物理学 2013-02-01 Harald Fritzsch , Shun Zhou

Within the framework of residual symmetry, two $\mathbb{Z}_2$ type associate $\mu\tau$ interchange symmetries robustly constrain the Dirac CP phase $\delta$ in a model independent way. Both of them predict simultaneous maximality of…

高能物理 - 唯象学 · 物理学 2020-01-08 Rome Samanta , Roopam Sinha , Ambar Ghosal

We study a model with partial quark-lepton universality that can naturally arise in grand unified theories. We find that constraints on the model can be reduced to a single condition on the Dirac CP phase $\delta$ in the neutrino sector.…

高能物理 - 唯象学 · 物理学 2015-10-02 Jiajun Liao , D. Marfatia , K. Whisnant

In the three-Higgs doublet model (3HDM) frame, we search for discrete flavour symmetries that give relations among the lepton masses and their mixing angles. We explore discreet non-Abelian groups of order less than 1035, treating neutrinos…

高能物理 - 唯象学 · 物理学 2023-09-18 Joris Vergeest , Marek Zrałek , Bartosz Dziewit , Piotr Chaber

We consider a minimal condition that predicts the 1-3 lepton mixing angle $\theta_{13} \simeq \theta_{\rm C}/\sqrt{2}$ with $\theta_{\rm C}$ the Cabibbo angle, and give the improved prediction of $\theta_{13}$. In the case of normal mass…

高能物理 - 唯象学 · 物理学 2016-01-19 Junpei Harada

We introduce a lepton mass generation and flavor mixing model, realized through a (2,3) inverse seesaw structure based on modular \( S_4 \) symmetry. The model employs modular forms to construct the lepton Yukawa couplings, significantly…

高能物理 - 唯象学 · 物理学 2025-09-23 Abhishek , V. Suryanarayana Mummidi

We construct a supersymmetric model for leptons and quarks with the flavor symmetry Delta(384) and CP. The peculiar features of lepton and quark mixing are accomplished by the stepwise breaking of the flavor and CP symmetry. The correct…

高能物理 - 唯象学 · 物理学 2020-02-17 Claudia Hagedorn , Johannes König

We reexamine lepton mixing in gauge models by considering two theories within the type I seesaw mechanism, the Extended Standard Model, i.e. SU(2)_L \times U(1)_Y with singlet right-handed heavy neutrinos, and the Left-Right Model SU(2)_L x…

高能物理 - 唯象学 · 物理学 2015-07-28 Domenico Falcone , Luis Oliver

We present a concise review of the recent important experimental developments on neutrino mixing (hints for sterile neutrinos, large $\theta_{13}$, possible non maximal $\theta_{23}$, approaching sensitivity on $\delta_{CP}$) and their…

高能物理 - 唯象学 · 物理学 2015-06-11 G. Altarelli