Split-Supersymmetry Searches in ATLAS

Split-Supersymmtrey is a beyond standard model scenario in which the hierarchy problem and the fine tuning of the Higgs mass is accepted, or assumed to be set by another, as yet unknown, mechanism. The name of the model originates from the large difference between scalar masses (except for the ordinary Higgs), near the GUT scale, and gaugino and higgsino masses which are of the order of the weak scale (protected by the chiral symmetry). Since gluino decays proceed via internal squark lines, gluinos can be meta-stable. A meta-stable gluino will form a bound state, a so-called R-hadron. In this poster, we present the techniques under investigation by the ATLAS Collaboration to detect such particles. Although the work is performed in the framework of SUSY, the techniques presented may be used in generic searches for stable heavy exotic hadrons.