Electroweak corrections to Neutralino and Chargino decays into a W-boson in the (N)MSSM

Abstract

We present the complete electroweak one-loop corrections to the partial widths for two-body decays of a chargino (neutralino) into a W-boson and a neutralino (chargino). We perform the calculation for the minimal and the next-to-minimal supersymmetric standard model using an on-shell renormalization scheme. Particular attention is paid to the question of gauge invariance which is achieved using the so-called pinch technique. Furthermore we show that these corrections show a strong parameter dependence and usually are in the range of 1-10 percent if the neutralino involved is a higgsino or wino like state. However, in case of a bino-like or a singlino-like neutralino the corrections can go up to 50% and more. Moreover we present the public program CNNDecays performing these calculations.

42 pages, 15 figures; discussion of on-shell masses added, renormalization of the electric charge and Bremsstrahlung integrals corrected, published in Nuclear Physics B

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• Light NMSSM Higgs bosons in SUSY cascade decays at the LHC
• Chargino Decays in the Complex MSSM: A Full One-Loop Analysis
• One-loop renormalisation of the NMSSM in SloopS : 1. the neutralino-chargino and sfermion sectors
• Neutralino Decays in the Complex MSSM at One-Loop: a Comparison of On-Shell Renormalization Schemes
• On-shell renormalization of neutralino and chargino mass matrices in R-parity violating models - Correlation between LSP decays and neutrino mixing angles revisited
• Phenomenology of on-shell Higgs production in the MSSM with complex parameters
• Anapole moment of the lightest neutralino in the cMSSM
• Gauge dependence of tadpole and mass renormalization for a seesaw extended 2HDM
• CP violation in bilinear R-parity violation and its consequences for the early universe
• The loop effects on the chargino decays ${\tilde{\chi }}_1^{\pm }\to {\tilde{\chi }}_1^{0}f{f}^{\prime }$ in the MSSM