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The high scale mixing unification hypothesis recently proposed by three of us (R. N. M., M. K. P. and G. R.) states that if at the seesaw scale, the quark and lepton mixing matrices are equal then for quasi-degenerate neutrinos, radiative…

高能物理 - 唯象学 · 物理学 2008-11-26 S. K. Agarwalla , M. K. Parida , R. N. Mohapatra , G. Rajasekaran

Four next-to-tribimaximal (NTBM) mixing patterns are widely considered as the feasible candidates for the observed leptonic mixing structure. With the recent measurements from T2K, as well as intensive global fits, the interval of…

高能物理 - 唯象学 · 物理学 2022-05-18 Shao-Ping Li , Yuan-Yuan-Li , Xin-Shuai Yan , Xin Zhang

Present data prefer a large but non-maximal 2-3 mixing in the lepton sector. We argue that this value, in connection with $\sin\theta_{13}\simeq 0.15$, is the generic outcome of minimal flavour structures. We present a few different…

高能物理 - 唯象学 · 物理学 2017-08-15 Michele Frigerio , Albert Villanova del Moral

We phenomenologically build a neutrino mass matrix obeying $\mu-\tau$ symmetry with only two parameters, Cabibbo angle $(\lambda)$ and a flavour twister parameter $(\eta)$. For vanishing $\eta$, the model assumes TBM mixing. When…

高能物理 - 唯象学 · 物理学 2013-04-09 Subhankar Roy , N. Nimai Singh

Sum rules in the lepton sector provide an extremely valuable tool to classify flavour models in terms of relations between neutrino masses and mixing parameters testable in a plethora of experiments. In this manuscript we identify new…

高能物理 - 唯象学 · 物理学 2021-03-22 Julia Gehrlein , Martin Spinrath

We discussed the scenario that a discrete flavor group combined with CP symmetry is broken to $Z_2\times CP$ in both neutrino and charged lepton sectors. All lepton mixing angles and CP violation phases are predicted to depend on two free…

高能物理 - 唯象学 · 物理学 2018-04-04 Cai-Chang Li , Jun-Nan Lu , Gui-Jun Ding

The generalized CP transformations can only be consistently defined in the context of $\Delta(3n^2)$ lepton symmetry if a certain subset of irreducible representations are present in a model. We perform a comprehensive analysis of the…

高能物理 - 唯象学 · 物理学 2016-01-27 Gui-Jun Ding , Stephen F. King

The current status of our knowledge of the 3-neutrino mixing parameters and of the CP violation in the lepton sector is summarised. The discrete symmetry approach to understanding the observed pattern of neutrino mixing and the related…

高能物理 - 唯象学 · 物理学 2018-09-26 S. T. Petcov

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

A new theoretical insight into the pattern of neutrino mixing and leptonic $CP$ violation is presented. It leads naturally and uniquely to a specific dark sector of three real neutral scalar singlets, with the radiative implementation of…

高能物理 - 唯象学 · 物理学 2015-09-09 Ernest Ma

Model-independent consequences of applying a generalized hidden horizontal Z_2 symmetry to the neutrino mass matrix are explored. The Dirac CP phase delta_D can be expressed in terms of the three mixing angles as 4 c_a s_a c_s s_s s_x cos…

高能物理 - 唯象学 · 物理学 2011-08-11 Shao-Feng Ge , Duane A. Dicus , Wayne W. Repko

We study effects of CP violation in a modified bipair neutrino mixing scheme predicting $\sin^2\theta_{23}$ near both 0.4 and 0.6 currently consistent with experimentally allowed values. The source of CP violation is supplied by charged…

高能物理 - 唯象学 · 物理学 2015-06-19 Jun Iizuka , Yoshikazu Kaneko , Teruyuki Kitabayashi , Naoto Koizumi , Masaki Yasue

The overall characteristics of the solar and atmospheric neutrino oscillation are approximately consistent with a tribimaximal form of the mixing matrix $U$ of the lepton sector. Exact tribimaximal mixing leads to $\theta_{13}=0$. However,…

高能物理 - 唯象学 · 物理学 2016-05-03 N. Razzaghi , S. S. Gousheh

The recent measurement of a non-zero neutrino mixing angle $\theta_{13}$ requires a modification of the tri-bimaximal mixing pattern that predicts a zero value for it. We propose a new neutrino mixing pattern based on a spontaneously-broken…

高能物理 - 唯象学 · 物理学 2013-05-30 Y. H. Ahn , Seungwon Baek , Paolo Gondolo

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 2022-03-02 Guido Altarelli

There is a wide class of models which give a dynamical description of the origin of flavour in terms of spontaneous symmetry breaking of an underlying symmetry. Many of these models exhibit sum rules which relate on the one hand mixing…

高能物理 - 唯象学 · 物理学 2016-05-30 Martin Spinrath

We investigate the renormalization group evolution of masses and mixing angles of Majorana neutrinos under the `High Scale Mixing Unification' hypothesis. Assuming the unification of quark-lepton mixing angles at a high scale, we show that…

高能物理 - 唯象学 · 物理学 2014-05-23 Gauhar Abbas , Saurabh Gupta , G. Rajasekaran , Rahul Srivastava

We propose two schemes for the lepton mixing matrix $U = U_l^\dagger U_\nu$, where $U = U_l$ refers to the charged sector, and $U_\nu$ denotes the neutrino diagonalization matrix. We assume $U_\nu$ to be CP conserving and its three angles…

高能物理 - 唯象学 · 物理学 2019-04-18 Peng Chen , Gui-Jun Ding , Rahul Srivastava , José W. F. Valle

It is proposed that all flavor mixing is caused by the mixing of the three quark and lepton families with vectorlike fermions in 5 + 5-bar multiplets of SU(5). This simple assumption implies that both V_{CKM} and U_{MNS} are generated by a…

高能物理 - 唯象学 · 物理学 2015-06-11 S. M. Barr , Heng-Yu Chen

We present a new model of the lepton sector that uses a family symmetry A4 to make predictions for lepton mixing which are invariant under any permutation of the three flavours. We show that those predictions broadly agree with the…

高能物理 - 唯象学 · 物理学 2015-06-16 P. M. Ferreira , L. Lavoura , P. O. Ludl