Abstract
An on-shell renormalization program for the chargino/neutralino and the sfermion sectors within the minimal supersymmetric standard model as implemented in a fully automated code, sloops, for the calculation of one-loop processes at the colliders and in astrophysics, is presented. This is a sequel to our previous study where an on-shell renormalization of the Higgs (and the gauge/fermion) sector is performed. The issue of mixing is treated in a unified and coherent manner in all these sectors, in particular, we give some new insight into the renormalization of the mixing angle in the sfermion sector. Like with the issue of $\mathrm{tan}\ensuremath{\beta}$ in the Higgs sector, we discuss different schemes for the mixing in the sfermion sector. We also perform numerical comparisons between our code sloops and different results found in the literature. In particular, we consider loop corrections to the neutralino and sfermion masses, chargino pair production and stau pair production in ${e}^{+}{e}^{\ensuremath{-}}$ colliders as well as a few decays of the heavier chargino. For all these observables, we analyze the $\mathrm{tan}\ensuremath{\beta}$ scheme dependence using different definitions of this parameter and comment on the impact of using different renormalization of the mixing parameter in the sfermion sector.
Published Version
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