Search for Heavy, Long-Lived Particles that Decay to Photons at CDF II
Collaboration
7 pages
Published in:
- Phys.Rev.Lett. 99 (2007) 121801
e-Print:
- 0704.0760 [hep-ex]
Report number:
- FERMILAB-PUB-07-075-E
Experiments:
Citations per year
Abstract: (APS)
We present the first search for heavy, long-lived particles that decay to photons at a hadron collider. We use a sample of γ+jet+missing transverse energy events in pp¯ collisions at 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−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 χ˜10→γG˜ and place the world-best 95% C.L. lower limit on the χ˜10 mass of 101 GeV/c2 at τχ˜10=5 ns.- 13.85.Rm
- 12.60.Jv
- 14.80.Ly
- 13.85.Qk
- anti-p p: colliding beams
- anti-p p: inclusive reaction
- new particle
- final state: (jet photon)
- transverse energy: missing-energy
- supersymmetry: symmetry breaking
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