Results 1 to 10 of about 20,379 (180)
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
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6d SCFTs and U(1) flavour symmetries [PDF]
Journal of High Energy Physics, 2018 We study the behaviour of abelian gauge symmetries in six-dimensional N = (1,0) theories upon decoupling gravity and investigate abelian flavour symmetries in the context of 6d N = (1, 0) SCFTs.
Seung-Joo Lee +2 more
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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
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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
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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 +3 more
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Two A4 modular symmetries for Tri-Maximal 2 mixing
Nuclear Physics B, 2022 We construct a lepton flavour model based on two A4 modular symmetries. The two A4 are broken by a bi-triplet field to the diagonal A4 subgroup, resulting in an effective modular A4 flavour symmetry with two moduli. We employ these moduli as stabilisers,
Ivo de Medeiros Varzielas +1 more
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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 +2 more
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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
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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 +1 more
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Modular binary octahedral symmetry for flavor structure of Standard Model
Journal of High Energy Physics, 2023 We have investigated the modular binary octahedral group 2O as a flavor symmetry to explain the structure of Standard Model. The vector-valued modular forms in all irreducible representations of this group are constructed. We have classified all possible
Gui-Jun Ding +3 more
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