Results 1 to 10 of about 20,760 (329)
U(1) flavour symmetries as Peccei-Quinn symmetries [PDF]
Journal of High Energy Physics, 2019 We investigate to what extent a generic, generation-dependent U(1) symmetry acting on the quark Yukawa operators can reduce the number of free parameters by forcing some entries in the Yukawa matrices to vanish.
Fredrik Björkeroth +3 more
doaj +4 more sources
Flavour Symmetries and Kahler Operators [PDF]
Journal of High Energy Physics, 2004 Any supersymmetric mechanism to solve the flavour puzzle would generate mixing both in the superpotential Yukawa couplings and in the Kahler potential.
J.R Espinosa, A Ibarra
core +5 more sources
Flavour symmetries in the SMEFT [PDF]
Journal of High Energy Physics, 2020 We analyse how U(3)5 and U(2)5 flavour symmetries act on the Standard Model Effective Field Theory, providing an organising principle to classify the large number of dimension-six operators involving fermion fields. A detailed counting of such operators,
Darius A. Faroughy +3 more
doaj +6 more sources
Symmetry constrained two Higgs doublet models
European Physical Journal C: Particles and Fields, 2018 We study two-Higgs-doublet models (2HDM) where Abelian symmetries have been introduced, leading to a drastic reduction in the number of free parameters in the 2HDM.
João M. Alves +5 more
doaj +3 more sources
Low-scale leptogenesis with flavour and CP symmetries [PDF]
Journal of High Energy Physics, 2022 We consider a type-I seesaw framework endowed with a flavour symmetry, belonging to the series of non-abelian groups ∆(3 n 2) and ∆(6 n 2), and a CP symmetry.
M. Drewes +3 more
doaj +2 more sources
Flavour in supersymmetry: horizontal symmetries or wave function renormalisation [PDF]
, 2010 We compare theoretical and experimental predictions of two main classes of models addressing fermion mass hierarchies and flavour changing neutral currents (FCNC) effects in supersymmetry: Froggatt-Nielsen (FN) U(1) gauged flavour models and Nelson ...
Emilian Dudaş +3 more
openalex +6 more sources
Dipole operator constraints on composite Higgs models. [PDF]
Eur Phys J C Part Fields, 2014 Flavour- and CP-violating electromagnetic or chromomagnetic dipole operators in the quark sector are generated in a large class of new physics models and are strongly constrained by measurements of the neutron electric dipole moment and observables ...
König M, Neubert M, Straub DM.
europepmc +2 more sources
Predictions from a flavour GUT model combined with a SUSY breaking sector
Journal of High Energy Physics, 2017 We discuss how flavour GUT models in the context of supergravity can be completed with a simple SUSY breaking sector, such that the flavour-dependent (non-universal) soft breaking terms can be calculated.
Stefan Antusch, Christian Hohl
doaj +3 more sources
Charged lepton flavour violation from inverse seesaw with flavour and CP symmetries
Nuclear Physics BWe study charged lepton flavour violation in a scenario in which light neutrino masses are generated via the inverse seesaw mechanism with 3+3 gauge singlet fermions, Ni and Sj, i,j=1,2,3.
F.P. Di Meglio, C. Hagedorn
doaj +2 more sources
Implications of the Muon g-2 result on the flavour structure of the lepton mass matrix
European Physical Journal C: Particles and Fields, 2021 The confirmation of the discrepancy with the Standard Model predictions in the anomalous magnetic moment by the Muon g-2 experiment at Fermilab points to a low scale of new physics.
Lorenzo Calibbi +3 more
doaj +1 more source