Results 71 to 80 of about 20,379 (180)

Multiple realizations of modular flavor symmetries and their phenomenology

Journal of High Energy Physics
We point out that specifying the finite modular group does not uniquely fix a modular flavor symmetry. We illustrate this using the finite modular group T′. Otherwise equivalent models based on different T′ lead to modular forms with different properties
Carlos Arriaga-Osante, Mu-Chun Chen, Ramón Díaz-Castro, Xueqi Li, Xiang-Gan Liu, Saúl Ramos-Sánchez, Michael Ratz   +6 more
doaj   +1 more source

The mathematical structure of U-spin amplitude sum rules

Journal of High Energy Physics, 2022
We perform a systematic study of SU(2) flavor amplitude sum rules with particular emphasis on U-spin. This study reveals a rich mathematical structure underlying the sum rules that allows us to formulate an algorithm for deriving all U-spin amplitude sum
Margarita Gavrilova, Yuval Grossman, Stefan Schacht   +2 more
doaj   +1 more source

Quantum Gravity, Flavour Vacua and Supersymmetry

, 2011
I review a novel and non-perturbative way of breaking Supersymmetry in the flavour sector of electrically neutral particles, as a result of flavour mixing in the presence of stringy quantum gravity space-time foam backgrounds that violate Lorentz and CPT
Antoniadis, Bernabeu, Blasone, Capolupo, Ellis, Ellis, Ellis, Giacosa, Kostelecky, Li, Lust, Mavromatos, Mavromatos, Mavromatos, Mavromatos, Mercuri   +15 more
core   +1 more source

Charged-Higgs phenomenology in the Aligned two-Higgs-doublet model [PDF]

, 2010
The alignment in flavour space of the Yukawa matrices of a general two-Higgs-doublet model results in the absence of tree-level flavour-changing neutral currents.
A Dighe, A Hocker, A Kastner, A Lai, A Lenz, A Pich, A Pich, A Pich, A Pich, A Wahab El Kaffas, AG Akeroyd, AG Akeroyd, AG Akeroyd, AG Akeroyd, AG Akeroyd, AG Akeroyd, AJ Buras, AJ Buras, AJ Buras, AJ Buras, AJ Buras, AJ Buras, AJ Buras, AJ Buras, AL Kagan, ALEPH collaboration, Antonio Pich, B Aubert, B Aubert, B Grinstein, B Grinstein, BA Dobrescu, BI Eisenstein, C Amsler, C Aubin, CB Braeuninger, CG Callan, CW Bauer, CW Bauer, D Atwood, D Becirevic, D Becirevic, E Abouzaid, E Follana, E Gamiz, E Ma, E Ma, F Ambrosino, F Borzumati, F Gabbiani, F Mahmoudi, FJ Botella, G Barenboim, G Burdman, G Cvetič, G Degrassi, G D’Ambrosio, GC Branco, GM Divitiis de, H Flacher, H Leutwyler, HE Haber, HE Haber, HE Logan, HE Logan, J Bernabeu, J Bernabeu, J Bijnens, J Charles, J Gasser, J Gunion, J Urban, JC Hardy, JF Donoghue, JF Kamenik, JH Field, JL Diaz-Cruz, JL Diaz-Cruz, JM Gerard, JP Alexander, K Abe, KG Chetyrkin, L Lopez Honorez, LJ Hall, LJ Hall, M Antonelli, M Aoki, M Bona, M Bona, M Ciuchini, M Ciuchini, M Jamin, M Kobayashi, M Misiak, M Misiak, M Neubert, M Wingate, Martin Jung, MJ Savage, N Cabibbo, NG Deshpande, P Ciafaloni, P Gambino, P Naik, PA Boyle, Paula Tuzón, PM Ferreira, PUE Onyisi, R Barbieri, R Decker, R Decker, RF Dashen, RS Chivukula, RS Gupta, S Davidson, S Dürr, S Herrlich, SL Glashow, T Aaltonen, T Feldmann, TP Cheng, U Nierste, V Bernard, V Cirigliano, V Cirigliano, V Cirigliano, V Cirigliano, V Lubicz, VD Barger, VM Abazov, VM Abazov, VM Abazov, VM Abazov, WJ Marciano, WJ Marciano, WJ Marciano, Y Grossman, YH Ahn   +137 more
core   +2 more sources

Flavor symmetries from modular subgroups in magnetized compactifications

Journal of High Energy Physics
We study the flavor structures of zero-modes, which are originated from the modular symmetry on T 1 2 × T 2 2 $$ {T}_1^2\times {T}_2^2 $$ and its orbifold with magnetic fluxes. We introduce the constraint on the moduli parameters by τ 2 = Nτ 1, where τ i
Tatsuo Kobayashi, Kaito Nasu, Ryusei Nishida, Hajime Otsuka, Shohei Takada   +4 more
doaj   +1 more source

Fermion masses, critical behavior and universality

Journal of High Energy Physics, 2023
We look for signals of critical behavior in the Yukawa sector. By reviewing a set of models for the fermion masses, we select those where a symmetry-breaking order parameter sits at a transition point between a disordered phase and an ordered one.
Ferruccio Feruglio
doaj   +1 more source

Confronting Flavour Symmetries and extended Scalar Sectors with Lepton Flavour Violation Bounds

, 2009
We discuss the tension between discrete flavour symmetries and extended scalar sectors arising from lepton flavour violation experiments. The key point is that extended scalar sectors will generically lead to flavour changing neutral currents, which are ...
Adulpravitchai, Adisorn, Lindner, Manfred, Merle, Alexander   +2 more
core   +1 more source

Spin-Flavour Symmetry and Contractions Towards Classical Space-Time Symmetry [PDF]

International Journal of Modern Physics A, 1997
A classification scheme of hadrons is proposed on the basis of the division algebra H of quaternions and an appropriate geometry. This scheme suggests strongly to understand flavour symmetry in another manner than from standard symmetry schemes. In our approach, we do not start from "exact" symmetry groups like SU(2) × SU(2) chiral symmetry and impose
openaire   +3 more sources

See-Saw Masses for Quarks and Leptons in SU(5)

, 2011
We build on a recent paper by Grinstein, Redi and Villadoro, where a see-saw like mechanism for quark masses was derived in the context of spontaneously broken gauged flavour symmetries.
AJ Buras, B Grinstein, G D’Ambrosio, H Fritzsch, H Georgi, H Georgi, JC Pati, ME Albrecht, R Slansky, RN Mohapatra, T Feldmann, T Feldmann, T Feldmann, Thorsten Feldmann, U Amaldi, V Cirigliano   +15 more
core   +1 more source

Lepton Flavour Violation in Unified Models with U(1)-Family Symmetries [PDF]

, 1998
Lepton flavour non-conserving processes are examined in the context of unified models with U(1)-family symmetries which reproduce successfully the low-energy hierarchy of the fermion mass spectrum and the Kobayashi - Maskawa mixing.
G.K. Leontaris, Ibáñez, N.D. Tracas
core   +3 more sources