Search for chargino and neutralino production using the OPAL detector at s**(1/2) = 130-GEV - 136-GeV at LEP

Collaboration
Feb, 1996
18 pages
Published in:
  • Phys.Lett.B 377 (1996) 181-194
Report number:
  • CERN-PPE-96-020,
  • CERN-PPE-96-20
Experiments:

Citations per year

199620002004200820110510152025
Abstract: (Elsevier)
A search for charginos and neutralinos, predicted by supersymmetric theories, has been performed using a data sample of 2.6 pb −1 at a centre-of-mass energy of S =130 GeV and 2.6 pb −1 at 136 GeV collected with the OPAL detector at LEP during November 1995. No candidate events were observed. The 95% C.L. lower limit on the lightest chargino mass in the Minimal Supersymmetric Standard Model is 65.4 GeV if the universal scalar mass m 0 is greater than 1 TeV, and 58.7 GeV for the smallest m 0 compatible with slepton and sneutrino mass limits obtained at centre-of-mass energies near the Z peak. These limits were obtained under the conditions that the lightest chargino is heavier than the lightest neutralino by more than 10 GeV and tan β is larger than 1.5. The results of a model independent search for charginos and neutralinos are also given.
  • electron positron: colliding beams
  • colliding beams: electron positron
  • electron positron: annihilation
  • annihilation: electron positron
  • sparticle: search for
  • chargino
  • neutralino
  • sparticle: mass
  • mass: sparticle
  • lower limit