S. Heinemeyer, F. v. d. Pahlen, C. Schappacher
We review the evaluation of 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 SM gauge bosons. The evaluation
of the decay widths is based on a full one-loop calculation including hard and
soft QED radiation. Here we focus on the decays involving the Lightest
Supersymmetric Particle (LSP), i.e. the lightest neutralino, or a heavier
neutralino and a W boson. The higher-order corrections of the chargino decay
widths can easily reach a level of \pm 10%, translating into corrections of
similar size in the respective branching ratios. These corrections are
important for the correct interpretation of LSP and heavier neutralino
production at the LHC and at a future linear e+e- collider.
View original:
http://arxiv.org/abs/1202.0488
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