Cornering gauge-mediated supersymmetry breaking with quasistable sleptons at the Fermilab Tevatron - art. no. 035008.

There are many theoretical reasons why heavy quasistable charged particles might exist. Pair production of such particles at the Fermilab Tevatron can produce highly ionizing tracks or fake muons. In gauge-mediated supersymme try breaking, sparticle production can lead to events with a pair of quasis table sleptons, a significant fraction of which will have the same electric charge. Depending on the production mechanism and the decay chain, they ma y also be accompanied by additional energetic leptons. We study the relativ e importance of the resulting signals for the Tevatron run II. The relative fraction of same-sign tracks to other background-free signals is an import ant diagnostic tool in gauge-mediated supersymmetry breaking that may provi de information about mass splittings, tan beta, and the number of messenger s communicating supersymmetry breaking. [S0556-2821(99)06301-8].