Search for Long-Lived Massive Charged Particles in 1.96 TeV pp Collisions

摘要

We performed a signature-based search for long-lived charged massive particles produced in 1.0 fb~(-1) of pp collisions at s~(1/2) = 1.96 TeV, collected with the CDF II detector using a high transverse-momentum (p_T) muon trigger. The search used time of flight to isolate slowly moving, high-p_T particles. One event passed our selection cuts with an expected background of 1.9 ± 0.2 events. We set an upper bound on the production cross section and, interpreting this result within the context of a stable scalar top-quark model, set a lower limit on the particle mass of 249 GeV/c~2 at 95% C.L.