Search for Heavy, Long-lived Particles that Decay to Photons in Ppbar Collisions at Sqrt(s) PDF Download

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Search for Heavy, Long-lived Particles that Decay to Photons in Ppbar Collisions at Sqrt(s)

Search for Heavy, Long-lived Particles that Decay to Photons in Ppbar Collisions at Sqrt(s) PDF Author: Peter Wagner
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This dissertation presents the results of the first search for heavy, neutral, longlived particles that decay to photons at a hadron collider. We use a sample of +jet+missing transverse energy events in pp̄ collisions at s = 1.96 TEV taken with the Collider Detector at Fermilab. Candidate events are selected based on the arrival time of a high-energy photon at the electromagnetic calorimeter as measured with a timing system that was recently installed. The final result is that we find 2 events, using 570"34 pb−1 of data collected during 2004-2005 at the Fermilab Tevatron, consistent with the background estimate of 1.3"0.7 events.