2004/04/30 by Javier Ferrandis, Naoyuki Haba
Physics and Astronomy · #Cabibbo–Kobayashi–Maskawa matrix #Dimensionless quantity #Fermion #Flavor #High-Energy Particle Collisions Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Radiative transfer #Supersymmetry #Supersymmetry breaking #Symmetry breaking #Yukawa potential #hep-ph
paper · pdf · doi:10.1103/physrevd.70.055003
published as Phys.Rev. D70 (2004) 055003 · 14 pages, RevTex 4
arxiv created 2004/05/15 · openalex publication_date 2004/09/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present an effective flavor model for the radiative generation of fermion masses and mixings based on a SU(5)V\ifmmode×\else\texttimes\fiU(2)H symmetry. We assume that the original source of flavor breaking resides in the supersymmetry-breaking sector. Flavor violation is transmitted radiatively to the fermion Yukawa couplings at low energy through finite supersymmetric threshold corrections. This model can fit the fermion mass ratios and Cabibbo-Kobayashi-Maskawa matrix elements, explain the nonobservation of proton decay, and overcome the present constraints on flavor changing processes through an approximate radiative alignment between the Yukawa and the soft trilinear sector. The model predicts relations between dimensionless fermion mass ratios in the three fermion sectors, and the quark mixing angles, |Vus|\ensuremath≈[md/ms]1/2\ensuremath≈[mu/mc]1/4\ensuremath≈3[me/m_\ensuremathμ]1/2 and (1)/(2)|Vcb/Vus|\ensuremath≈[ms3/mb2md]1/2\ensuremath≈[mc3/mt2mu]1/2\ensuremath≈(1)/(9)[m_\ensuremathμ3/m_\ensuremathτ2me]1/2, which are confirmed by the experimental measurements.