Search for Heavy, Long-Lived Neutralinos that Decay to Photons at CDF II Using Photon Timing
Apr, 200827 pages
Published in:
- Phys.Rev.D 78 (2008) 032015
e-Print:
- 0804.1043 [hep-ex]
Report number:
- FERMILAB-PUB-08-078-E
Experiments:
Citations per year
Abstract: (arXiv)
We present the results of the first hadron collider search for heavy, long-lived neutralinos that decay via lightest neutralino to gamma gravitino in gauge-mediated supersymmetry breaking models. Using an integrated luminosity of of collisions at TeV, we select +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. We find 2 events, consistent with the background estimate of 1.30.7 events. While our search strategy does not rely on model-specific dynamics, we set cross section limits and place the world-best 95% C.L. lower limit on the neutralino mass of 101 GeV at lifetime = 5 ns.Note:
- Corrected author list
- 13.85.Rm
- 12.60.Jv
- 14.80.Ly
- 13.85.Qk
- anti-p p: colliding beams
- neutralino: hadroproduction
- neutralino: radiative decay
- neutralino: mass
- gravitino
- supersymmetry: symmetry breaking
References(40)
Figures(52)