A Direct search for neutralino production at LEP
Jul, 19909 pages
Published in:
- Phys.Lett.B 248 (1990) 211-219
- Published: 1990
Report number:
- CERN-PPE-90-95
Experiments:
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Abstract: (Elsevier)
A search has been performed for the production of neutralinos ( χ , χ ′) in e + e − annihilation at energies near the Z 0 pole. No evidence for these particles was found either in searches for events with two acoplanar jets, low visible energy, and missing p t (sensitive to Z 0 →χχ′→χχ f f ) or in searches for single-photon events (sensitive to Z 0 → χχ ′→ χχγ ). Model independent upper limits (at the 95% CL) on the branching ratio for the decay mode Z 0 → χχ ′ of a few 10 −4 are obtained for most of the range of neutralino masses that is kinematically accessible at LEP energies. Upper limits on the mixing factor of neutralinos are also placed as a function of the neutralino masses.- electron positron: colliding beams
- colliding beams: electron positron
- electron positron: annihilation
- annihilation: electron positron
- sparticle: search for
- sparticle: neutral particle
- Z0: electroproduction
- electroproduction: Z0
- Z0: decay modes
- decay modes: Z0
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