Fermionic decays of sfermions: a complete discussion at one-loop order

Abstract

We present a definition of an on-shell renormalization scheme for the sfermion and chargino-neutralino sector of the Minimal Supersymmetric Standard Model (MSSM). Then, apply this renormalization framework to the interaction between charginos/neutralinos and sfermions. A kind of universal corrections is identified, which allow to define effective chargino/neutralino coupling matrices. In turn, these interactions generate (universal) non-decoupling terms that grow as the logarithm of the heavy mass. Therefore the full MSSM spectrum must be taken into account in the computation of radiative corrections to observables involving these interactions. As an application we analyze the full one-loop electroweak radiative corrections to the partial decay widths Γ(\tilde{f} -> f\neut) and Γ(\tilde{f} -> f'\cplus) for all sfermion flavours and generations. These are combined with the QCD corrections to compute the corrected branching ratios of sfermions. It turns out that the electroweak corrections can have an important impact on the partial decay widths, as well as the branching ratios, in wide regions of the parameter space. The precise value of the corrections is strongly dependent on the correlation between the different particle masses.

LaTeX 53 pages, 22 figures, 3 tables. Typos corrected

References in corpus (12)

• Generating Feynman Diagrams and Amplitudes with FeynArts 3
• The Implementation of the Minimal Supersymmetric Standard Model in FeynArts and FormCalc
• On the neutral Higgs boson masses in the MSSM for arbitrary stop mixing
• Distinguishing Higgs models in H -> b b-bar / H -> tau^+ tau^-
• Complete one-loop corrections to the mass spectrum of charginos and neutralinos in the MSSM
• Prospects for heavy supersymmetric charged Higgs boson searches at hadron colliders
• One-loop corrections to the chargino and neutralino mass matrices in the on-shell scheme
• Regularization and supersymmetry-restoring counterterms in supersymmetric QCD
• Prospects for supersymmetric charged Higgs boson discovery at the Tevatron and the LHC
• Full electroweak one-loop radiative corrections to squark decays in the MSSM
• SUSY Scalar Production in the Electroweak Sudakov Regime of Lepton Colliders
• Review of Final LEP Results or A Tribute to LEP

Cited by in corpus (33)

• Physics Interplay of the LHC and the ILC
• SDECAY: a Fortran code for the decays of the supersymmetric particles in the MSSM
• Generic calculation of two-body partial decay widths at the full one-loop level
• Automatised full one-loop renormalisation of the MSSM II: The chargino-neutralino sector, the sfermion sector and some applications
• Proposals for Bottom Quark/Squark Renormalization in the Complex MSSM
• Top Squarks and Bottom Squarks in the MSSM with Complex Parameters
• NLO corrections to squark-squark production and decay at the LHC
• Heavy Scalar Top Quark Decays in the Complex MSSM: A Full One-Loop Analysis
• One-loop calculations of the decay of the next-to-lightest neutralino in the MSSM
• One-loop corrections, uncertainties and approximations in neutralino annihilations: Examples
• One-loop calculations for SUSY processes
• Full one-loop corrections to neutralino pair production in e+e- annihilation
• On the On-Shell Renormalization of the Chargino and Neutralino Masses in the MSSM
• Radiative Corrections to the Neutralino Dark Matter Relic Density - an Effective Coupling Approach
• Higgs boson pair production through gauge boson fusion at linear colliders within the general 2HDM
• Consistent on shell renormalisation of electroweakinos in the complex MSSM: LHC and LC predictions
• Automated third generation squark production to next-to-leading order
• Radiative corrections to scalar-fermion pair production in high energy e+e- collisions
• Heavy Scalar Tau Decays in the Complex MSSM: A Full One-Loop Analysis
• Quantum effects on Higgs-strahlung events at Linear Colliders within the general 2HDM
• Towards Measuring the Stop Mixing Angle at the LHC
• One-Loop Corrections to the Two-Body Decays of the Neutral Higgs Bosons in the Complex NMSSM
• Complete one-loop corrections to decays of charged and CP-even neutral Higgs bosons into sfermions
• Relic density calculations beyond tree-level, exact calculations versus effective couplings: the ZZ final state
• Top-squark pair production at the LHC: a complete analysis at next-to-leading order
• SFOLD - a program package for calculating two-body sfermion decays at full one-loop level in the MSSM
• Third generation sfermions decays into Z and W gauge bosons: full one-loop analysis
• Full one-loop electroweak and NLO QCD corrections to the associated production of chargino and neutralino at hadron colliders
• Full one-loop supersymmetric electroweak corrections to $t\bar{t}{h}^0$ associated production in $e^{+}{e}^{-}$ annihilation
• Determining the Stau Trilinear Coupling A_tau in Supersymmetric Higgs Decays
• Top-quark Polarization and Asymmetries at the LHC in the Effective Description of Squark Interactions
• The loop effects on the chargino decays ${\tilde{\chi }}_1^{\pm }\to {\tilde{\chi }}_1^{0}f{f}^{\prime }$ in the MSSM
• Full one-loop electroweak corrections to $h^0(H^0,A^0)H^{\pm }{W}^{\mp }$ associated productions at $e^{+}{e}^{-}$ linear colliders