Aspects of GMSB Phenomenology at TeV Colliders

The status of two on-going studies concerning important aspects of thephenomenology of gauge-mediated supersymmetry breaking (GMSB) models at TeVcolliders is reported. The first study deals with the characteristics of thelight Higgs boson spectrum allowed by the (minimal and non-minimal) GMSBframework. Today's most accurate GMSB model generation and two-loopFeynman-diagrammatic calculation of m_h have been combined. The Higgs massesare shown in dependence of various model parameters at the messenger andelectroweak scales. In the minimal model, an upper limit on m_h of about 124GeV is found for m_t = 175 GeV. The second study is focused on the measurementof the fundamental SUSY breaking scale sqrt(F) at the LHC in the GMSB scenariowhere a stau is the next-to-lightest SUSY particle (NLSP) and decays into agravitino with c*tau_NLSP in the range 0.5 m to 1 km. This implies themeasurement of mass and lifetime of long lived sleptons. The identification isperformed by determining the time of flight in the ATLAS muon chambers.Accessible range and precision on sqrt(F) achievable with a counting method areassessed.