Search for Heavy Long-Lived Particles that Decay to Photons at CDF II
- University of Illinois, Urbana, Illinois 61801 (United States)
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)
We present the first search for heavy, long-lived particles that decay to photons at a hadron collider. We use a sample of {gamma} + jet + missing transverse energy events in pp collisions at {radical}(s)=1.96 TeV taken with the CDF II detector. Candidate events are selected based on the arrival time of the photon at the detector. Using an integrated luminosity of 570 pb{sup -1} of collision data, we observe 2 events, consistent with the background estimate of 1.3{+-}0.7 events. While our search strategy does not rely on model-specific dynamics, we set cross section limits in a supersymmetric model with {chi}-tilde{sub 1}{sup 0}{yields}{gamma}G-tilde and place the world-best 95% C.L. lower limit on the {chi}-tilde{sub 1}{sup 0} mass of 101 GeV/c{sup 2} at {tau}{sub {chi}-tilde{sub 1}{sup 0}}=5 ns.
- OSTI ID:
- 21024169
- Journal Information:
- Physical Review Letters, Vol. 99, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.99.121801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). CDF Collaboration; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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