Bounds on supersymmetric flavour violating parameters from B→Xsγ

2001/05/28 by Thomas Besmer, C. Greub, Christoph Greub +1 · 109 citations
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Flavour #Gluino #Hadron #Higgs boson #Mass matrix #Mathematics #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Phenomenology (philosophy) #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Supersymmetry #hep-ph

paper · pdf · doi:10.1016/s0550-3213(01)00306-6

published in Nuclear Physics B 609(3), 359-386 (Elsevier BV) · 29 pages including 22 postscript figures

arxiv created 2001/05/28 · openalex publication_date 2001/08/01 · arxiv updated 2011/01/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We investigate the constraints on the flavour violating parameters from the decay B --> X_s gamma, taking into account the interplay of the various sources of flavour violation in the unconstrained MSSM. We present a systematic leading logarithmic QCD analysis of these model-independent constraints, including contributions from gluinos, neutralinos, charginos, charged Higgs bosons and interferences between them. We show that two simple combinations of elements of the down squark mass matrix are stringently bounded over large parts of the parameter space where only weak assumptions on the hierarchical structure of the squark mass matrices are made. We also briefly analyse up to which values SUSY contributions, compatible with B --> X_s gamma, can enhance the Wilson coefficient C₈(m_W), which plays an important role in the phenomenology of charmless hadronic B decays.

Citations

• Low-energy supergravity: False vacua and vacuous predictions
• The rare decay b→sg beyond leading logarithms
• A complete analysis of FCNC and CP constraints in general SUSY extensions of the standard model
• Weak radiative B-meson decay beyond leading logarithms
• Bremsstrahlung corrections to the decayb→sγ

Cited by

• Single top quark production via SUSY-QCD FCNC couplings at the CERN LHC in the unconstrained MSSM
• t→cV via SUSY FCNC couplings in the unconstrained MSSM
• Electroweak precision observables in the minimal supersymmetric standard model
• B, D and K decays
• t→cg,cγ,cZin the left-right supersymmetric model
• Solution for little hierarchy problem andb→sγ
• NNLL QCD contribution of the electromagnetic dipole operator to Γ(B¯→Xsγ)
• Reduction of charm quark mass scheme dependence inB¯→Xsγat the NNLL level
• Alternative approach to B^- → η^′ K^- branching ratio calculation