2002/06/06 by Yosef Nir, Guy Raz · 2 citations
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #CP violation #Geometry #Homogeneous space #Mass matrix #Mathematics #Minimal Supersymmetric Standard Model #Mixing (physics) #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Supersymmetry #hep-ph
paper · pdf · doi:10.1103/physrevd.66.035007
published as Phys.Rev. D66 (2002) 035007 · 20 pages, 3 figures
arxiv created 2002/06/06 · openalex publication_date 2002/08/23 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We reexamine the possibility that the solution to the supersymmetric flavor problem is related to small mixing angles in gaugino couplings induced by approximate horizontal Abelian symmetries. We prove that, for a large class of models, there is a single viable structure for the down quark mass matrix with four holomorphic zeros. Consequently, we are able to obtain both lower and upper bounds on the supersymmetric mixing angles and predict the contributions to various flavor changing neutral current processes. We find that the most likely signals for alignment are \ensuremathΔmD close to the present bound, significant CP violation in D0\ensuremath-D0 mixing, and shifts of the order of a few percent in various CP asymmetries in B0 and Bs decays. In contrast, the modifications to radiative B decays, to \ensuremathε^\ensuremath'/\ensuremathε and to \stackrel\ensuremath→K\ensuremathπ\ensuremathν\ensuremathν decays are small. We further investigate a new class of alignment models, where supersymmetric contributions to flavor changing processes are suppressed by both alignment and RGE-induced degeneracy.