Searches for supersymmetry in the photon(s) plus missing energy channels at s**(1/2) = 161-GeV and 172-GeV

Collaboration
Sep, 1997
15 pages
Published in:
  • Phys.Lett.B 420 (1998) 127-139
e-Print:
Report number:
  • CERN-PPE-97-122,
  • FSU-SCRI-98-46
Experiments:

Citations per year

1997200320092015202102468101214
Abstract:
Searches for supersymmetric particles in channels with one or more photons and missing energy have been performed with data collected by the ALEPH detector at LEP. The data consist of 11.1 pb-1 at s=161GeV\sqrt{s} = 161 GeV, 1.1 pb-1 at 170 GeV and 9.5 pb-1 at 172 GeV. The e+e- -> nunu+photon cross section is measured. The data are in good agreement with predictions based on the Standard Model, and are used to set upper limits on the cross sections for anomalous photon production. These limits are compared to two different SUSY models and used to set limits on the neutralino mass. A limit of 71 GeV/c^2 at 95% C.L. is set on the mass of the lightest neutralino (τχ10\tau_{\chi_{1}^{0}} \leq 3 ns) for the gauge-mediated supersymmetry breaking and LNZ models.
Note:
  • Latex, 15 pages with 7 eps figures Report-no: CERN-PPE/97-122
  • electron positron: colliding beams
  • electron positron: annihilation
  • sparticle: search for
  • sparticle: decay modes
  • supersymmetry: symmetry breaking
  • supergravity
  • sparticle: pair production
  • neutrino: pair production
  • photon: electroproduction
  • final state: ((n)photon missing-energy)