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The branching fraction for the decays of gluinos to third generation quarksis expected to be enhanced in classes of supersymmetric models where eitherthird generation squarks are lighter than other squarks, or in mixed-higgsinodark matter models constructed to be in concordance with the measured densityof cold dark matter. In such scenarios, gluino production events at the CERNLarge Hadron Collider should be rich in top and bottom quark jets. Requiringb-jets in addition to missing transverse energy should, therefore, enhance thesupersymmetry signal relative to Standard Model backgrounds from V + jet, VVand QCD backgrounds (V=W, Z). We quantify the increase in the supersymmetryreach of the LHC from b-tagging in a variety of well-motivated models ofsupersymmetry. We also explore ``top-tagging'' at the LHC. We find that whilethe efficiency for this turns out to be too low to give an increase in reachbeyond that obtained via b-tagging, top-tagging can indeed provide aconfirmatory signal if gluinos are not too heavy. Finally, we explore theprospects for detecting the direct production of third generation squarks inmodels with an inverted squark mass hierarchy. This is signalled by b-jets +missing transverse energy events harder than in the Standard Model, but softerthan those from the production of gluinos and heavier squarks. We find thatwhile these events can be readily separated from SM background (for thirdgeneration squark masses ~300-500 GeV), the contamination from the much heaviergluinos and squarks remains formidable if these are also accessible.

Heavy-flavour tagging and the supersymmetry reach of the CERN Large Hadron Collider