Signals of supersymmetry with inaccessible first two families at the Large Hadron Collider

Abstract

We investigate the signals of supersymmetry in a scenario where only the third family squarks and sleptons can be produced at the Large Hadron Collider, in addition to the gluino, charginos, and neutralinos. The final states in such cases are marked by a multiplicity of top or bottom quarks. We study, in particular, the case when the top squark, bottom squark, and gluino masses are near the TeV scale due to which, the final state t’s and b’s are very energetic. We point out the difficulty in b tagging and identifying energetic tops and suggest several event selection criteria which allow the signals to remain significantly above the standard model background. We show that such scenarios with gluino mass up to 2 TeV can be successfully probed at the Large Hadron Collider. Information on tanβ can also be obtained by looking at associated Higgs production in the cascades of accompanying neutralinos. We also show that a combined analysis of event rates in the different channels and the effective mass distribution allows one to differentiate this scenario from the one where all three sfermion families are accessible.