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We performed a signature-based search for long-lived charged massive particles produced in 1.0fb-1 of pp̄ collisions at s=1.96TeV, collected with the CDF II detector using a high transverse-momentum (pT) muon trigger. The search used time of flight to isolate slowly moving, high-pT 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 249GeV/c2 at 95% C.L. © 2009 The American Physical Society.

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Physical Review Letters