2009/09/22 by Sebastian M. R. Frank, Frank, Sebastian M. R.
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.0909.3969
Diploma Thesis, Johannes Kepler University Linz, Austria, May 2008, 86 pages, 36 figures
arxiv created 2009/09/22 · openalex publication_date 2009/09/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the Minimal Supersymmetric Standard Model (MSSM) with complex parameters, one-loop corrections to the decay of a stop into a bottom-quark and a chargino can lead to a CP violating decay rate asymmetry. We perform a detailed numerical analysis of this asymmetry and also of the branching ratio of the decay, analyzing the dependence on the parameters and complex phases involved. In addition, we take the Yukawa couplings of the top- and bottom-quark running. We account for the constraints on the parameters coming from the experimental limit of the electric dipole moment of the electron by calculating and thus checking it automatically along the way. We obtain as results that the asymmetry rises up to 24 percent, depending on the point in parameter space. The combined quantity asymmetry times branching ratio reaches up to 3.5 percent. We also comment on the feasibility of measuring this asymmetry at the Large Hadron Collider (LHC) at CERN. It will be possible to measure our decay rate asymmetry at LHC.