Search for chargino and neutralino production using the OPAL detector at s**(1/2) = 130-GEV - 136-GeV at LEP
Feb, 199618 pages
Published in:
- Phys.Lett.B 377 (1996) 181-194
Report number:
- CERN-PPE-96-020,
- CERN-PPE-96-20
Experiments:
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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
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