Download or read book Search for Heavy, Long-Lived Neutralinos that Decay to Photons at CDF II Using Photon Timing written by and published by . This book was released on 2008 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present the results of the first hadron collider search for heavy, long-lived neutralinos that decay via {tilde {chi}}1° → [gamma]{tilde G} in gauge-mediated supersymmetry breaking models. Using an integrated luminosity of 570 ± 34 pb−1 of p{bar p} collisions at √s = 1.96 TeV, they select [gamma]+jet+missing transverse energy candidate events based on the arrival time of a high-energy photon at the electromagnetic calorimeter as measured with a timing system that was recently installed on the CDF II detector. They find 2 events, consistent with the background estimate of 1.3 ± 0.7 events. While the search strategy does not rely on model-specific dynamics, they set cross section limits and place the world-best 95% C.L. lower limit on the {tilde {chi}}1° mass of 101 GeV/c2 at [tau]{sub {tilde {chi}}1°} = 5 ns.