Abstract:
In models of weak-scale supersymmetry, one can integrate out heavy
states (messengers, heavy superpartners, etc.) to to obtain an
effective broken-supersymmetric low-energy Lagrangian. This
Lagrangian can contain dimension-four gauge invariant Higgs
interactions that violate supersymmetry (SUSY). The
"wrong-Higgs" Yukawa couplings generated by one-loop radiative
corrections in the limit of heavy squarks and gluinos are a well
known example of this phenomenon. Likewise, it is possible to
generate gaugino--higgsino--Higgs boson interactions that violate
supersymmetry. Such wrong-Higgs gaugino couplings can arise in models
of gauge-mediated SUSY-breaking in which some of the messenger fields
couple to the MSSM Higgs bosons. In regions of parameter space where
the messenger scale is low and \tan{\beta} is large, these hard
SUSY-breaking operators yield \tan{\beta}-enhanced corrections to
tree-level supersymmetric relations in the chargino and neutralino
sectors. As an example, I demonstrate how physical observables in the
chargino sector can be used to isolate the \tan\beta-enhanced
effects derived from the wrong-Higgs gaugino operators.
