https://doi.org/10.1140/epjc/s10052-015-3442-5
Regular Article - Theoretical Physics
Higgs decays into charginos and neutralinos in the complex MSSM: a full one-loop analysis
1
Instituto de Física de Cantabria (CSIC-UC), Santander, Spain
2
Institut für Theoretische Physik, Karlsruhe Institute of Technology, 76128, Karlsruhe, Germany
* e-mail: Sven.Heinemeyer@cern.ch
Received:
18
March
2015
Accepted:
5
May
2015
Published online:
27
May
2015
For the search for additional Higgs bosons in the minimal supersymmetric standard model (MSSM) as well as for future precision analyses in the Higgs sector a precise knowledge of their decay properties is mandatory. We evaluate all two-body decay modes of the Higgs bosons into charginos and neutralinos in the MSSM with complex parameters (cMSSM). The evaluation is based on a full one-loop calculation of all decay channels, also including hard QED radiation. We restricted ourselves to a version of our renormalization scheme which is valid for 
and 
to simplify the analysis, even though we are able to switch to other parameter regions. The dependence of the Higgs boson predictions on the relevant cMSSM parameters is analyzed numerically. We find sizable contributions to many partial decay widths. They are roughly of 10 % of the tree-level results, but they can go up to 20 % or higher. The full one-loop contributions are important for the correct interpretation of heavy Higgs boson search results at the LHC and, if kinematically allowed, at a future linear 
collider. There are plans to implement the evaluation of the branching ratios of the Higgs bosons into the Fortran code FeynHiggs, together with an automated choice of the renormalization scheme valid for the full cMSSM parameter space.
© SIF and Springer-Verlag Berlin Heidelberg, 2015
