R-parity Violation and Flavour Violation
نویسنده
چکیده
The MSSM with R-Parity violation allows flavour changing neutral currents through two mechanisms, directly through one loop diagrams, and indirectly through the generation of flavour violation in the sparticle sector. We discuss the use of these mechanisms for constraining R-Parity violation, and show that the indirect mechanism parametrised in terms of the running of the soft masses from the unification or Planck scale typically dominates previously calculated effects. We discuss neutrino mass generation, µ → eγ, b → sγ, and K 0 − ¯ K 0 mixing as examples.
منابع مشابه
R - Parity Violation and Quark Flavour Violation
We investigate the implications of R-Parity violation (RPV) for quark flavour violation both by constraining the sneutrino masses to be positive and by studying the processes b → sγ and K − K̄ mixing. In the latter there are two major contributions, one from “direct” one loop diagrams involving RPV couplings, and one from the “indirect” contributions generated by the renormalisation group. We co...
متن کاملMinimal Flavour Violation and Neutrino Masses without R-parity
We study the extension of the Minimal Flavour Violation (MFV) hypothesis to the MSSM without R-parity. The novelty of our approach lies in the observation that supersymmetry enhances the global symmetry of the kinetic term and in the fact that we consider as irreducible sources of the flavour symmetry breaking all the couplings of the superpotential including the R-parity violating ones. If R-p...
متن کاملR - parity Violation Effects through Soft Supersymmetry Breaking Terms and the Renormalisation Group
We present full renormalisation group equations for the MSSM with R-parity violation, including all soft supersymmetry breaking terms. The inclusion of dimensionless R-parity violating couplings can generate many possible low energy effects through the generation of off-diagonal soft masses violating lepton and quark flavour, and through the generation of lepton-Higgs mixing. We discuss the rel...
متن کاملFlavour-dependent and Basis-independent Measures of R Violation
We construct lepton avour-dependent and basis-independent measures of R-parity violation in the minimal supersymmetric extension of the Standard Model (MSSM). We work in the context of exact supersymmetry, neglecting the eeects of Higgs vacuum expectation values and soft supersymmetry-breaking terms. We devote particular attention to appropriate choices of avour eigenstates, and to the counting...
متن کاملSingle sneutrino production in γγ collisions
We study the single production of sneutrinos with two leptons (or jets) via γγ collision in an R-parity (R p) violating supersymmetric model. The subsequent decays of the sneutrino are also considered. The single production of sneutrinos may provide a significant test of supersymmetry and R p-violation with flavour conserving and flavour changing final states. If such processes coming from R p ...
متن کامل