Testing the gaugino AMSB model at the Tevatron via slepton pair production

Abstract

Gaugino AMSB models — wherein scalar and trilinear soft SUSY breaking terms are suppressed at the GUT scale while gaugino masses adopt the AMSB form — yield a characteristic SUSY particle mass spectrum with light sleptons along with a nearly degenerate wino-like lightest neutralino and quasi-stable chargino. The left-sleptons and sneutrinos can be pair produced at sufficiently high rates to yield observable signals at the Fermilab Tevatron. We calculate the rate for isolated single and dilepton plus missing energy signals, along with the presence of one or two highly ionizing chargino tracks (HITs). We find that Tevatron experiments should be able to probe gravitino masses into the ∼55 TeV range for inoAMSB models (depending on detector-dependent HIT detection efficiency), which corresponds to a reach in gluino mass of over 1100 GeV.