Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-12-04
Eur.Phys.J. C72 (2012) 1892
Physics
High Energy Physics
High Energy Physics - Phenomenology
75 pages, 43 figures. Minor corrections; version to appear in EPJC
Scientific paper
10.1140/epjc/s10052-012-1892-6
We evaluate two-body decay modes of charginos in the Minimal Supersymmetric Standard Model with complex parameters (cMSSM). Assuming heavy scalar quarks we take into account all decay channels involving charginos, neutralinos, (scalar) leptons, Higgs bosons and Standard Model gauge bosons. The evaluation of the decay widths is based on a full one-loop calculation including hard and soft QED radiation. Special attention is paid to decays involving the Lightest Supersymmetric Particle (LSP), i.e. the lightest neutralino, or a neutral or charged Higgs boson. The higher-order corrections of the chargino decay widths involving the LSP can easily reach a level of about \pm 10%, while the corrections to the decays to Higgs bosons are slightly smaller, translating into corrections of similar size in the respective branching ratios. These corrections are important for the correct interpretation of LSP and Higgs production at the LHC and at a future linear e+e- collider. The results will be implemented into the Fortran code FeynHiggs.
der Pahlen Federico von
Heinemeyer Sven
Schappacher Christian
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