Results 21 to 30 of about 117,250 (270)

THE FLAVOUR PROBLEM AND FAMILY SYMMETRY [PDF]

String Phenomenology 2003, 2004
We show how two different family symmetries can be used to address the flavour problem in SO(10)-like models. The first is based on a gauged $U(1)_F$, whose problems dissappear in the context of a type I string model embedding. The second is based on $SU(3)_F$, the maximal family group consistent with SO(10); in this case the family symmetry is more ...
King, S.F., Peddie, I.N.R
openaire   +2 more sources

Flavour bounds on the flavon of a minimal and a non-minimal $${\mathcal {Z}}_2 \times {\mathcal {Z}}_N$$ Z 2 × Z N symmetry

European Physical Journal C: Particles and Fields, 2023
We investigate flavour bounds on the $${\mathcal {Z}}_2 \times {\mathcal {Z}}_5$$ Z 2 × Z 5 and $${\mathcal {Z}}_2 \times {\mathcal {Z}}_9$$ Z 2 × Z 9 flavour symmetries.
Gauhar Abbas, Vartika Singh, Neelam Singh, Ria Sain   +3 more
doaj   +1 more source

Flavor anomalies meet flavor symmetry

Physical Review D, 2023
71 pages + appendices, 27 figures Matches version accepted for publication in Physical Review ...
Innes Bigaran, Tobias Felkl, Claudia Hagedorn, Michael A. Schmidt   +3 more
openaire   +3 more sources

FCNC-free multi-Higgs-doublet models from broken family symmetries

Physics Letters B, 2020
We demonstrate how residual flavour symmetries, infrared signatures of symmetry breaking in complete models of flavour, can naturally forbid (or limit in a flavour specific way) flavour-changing neutral currents (FCNC) in multi-Higgs-doublet models (MHDM)
Ivo de Medeiros Varzielas, Jim Talbert
doaj   +1 more source

Littlest modular seesaw

Journal of High Energy Physics, 2023
We present the first complete model of the Littlest Modular Seesaw, based on two right-handed neutrinos, within the framework of multiple modular symmetries, justifying the use of multiple moduli fields which take their values at 3 specific stabilizers ...
Ivo de Medeiros Varzielas, Steve F. King, Miguel Levy   +2 more
doaj   +1 more source

CPV Predictions from Flavour Symmetries [PDF]

Proceedings of Neutrino Oscillation Workshop — PoS(NOW2016), 2017
In the reference 3-neutrino mixing scheme leptonic CP violation can be caused by the Dirac, $\delta$, and/or Majorana, $\alpha_{21}$ and $\alpha_{31}$, CP-violating phases present in the unitary neutrino mixing matrix $U$. Using the fact that $U = U_e^\dagger U_\nu$, $U_e$ and $U_\nu$ being unitary matrices diagonalising the charged lepton and neutrino
Girardi I, Petcov S, Titov A
openaire   +2 more sources

Lepton flavour violation and flavour symmetries [PDF]

Fortschritte der Physik, 2012
AbstractIn this review article, we highlight the impact of models incorporating flavour symmetries on charged lepton flavour violating (LFV) processes. Flavour symmetries provide a natural approach to explain the peculiar mass hierarchies and mixing patterns of the Standard Model fermions.
openaire   +3 more sources

Combining Pati-Salam and flavour symmetries [PDF]

Journal of High Energy Physics, 2015
26 pages, 5 ...
Feldmann, Thorsten, Hartmann, Florian, Kilian, Wolfgang, Luhn, Christoph   +3 more
openaire   +2 more sources

Predicting the flavour and SUSY flavour structure from grand unified theories [PDF]

, 2016
Grand Unified Theories (GUTs) offer an attractive framework for flavour models, since they feature relations between quarks and leptons. Combining them with Supersymmetry (SUSY) and flavour symmetries, we derive predictions for the flavour and SUSY ...
Sluka, Constantin
core   +1 more source

Two A5 modular symmetries for Golden Ratio 2 mixing

Nuclear Physics B, 2022
We present a model of leptonic mixing based on two A5 modular symmetries using the Weinberg operator. The two modular symmetries are broken to the respective diagonal A5 subgroup.
Ivo de Medeiros Varzielas, João Lourenço   +1 more
doaj   +1 more source