Search for neutralinos in decays
Collaboration
11 pages
Published in:
- Phys.Lett.B 350 (1995) 109-119
- Published: 1995
Report number:
- CERN-PPE-95-014,
- CERN-PPE-95-14
Experiments:
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Abstract: (Elsevier)
We have searched for neutralinos produced via the reactions e + e − → χχ′ and e + e − → χ′χ′, where the next-to lightest neutralino, χ′, decays into the lightest neutralino, χ, and either a photon or a fermion pair. Based on 1.8 × 10 6 hadronic Z decays collected with the L3 detector at LEP, no signal has been observed. We present upper limits of a few times 10 −5 on the branching ratios Z → χχ′ and Z → χ′χ′. In the framework of the Minimial Supersymmetric Standard Model, we exclude a lightest χ with m χ less than 18 GeV, if either tan β > 2 or the gluino mass m ≈ g > 100 GeV.- electron positron: colliding beams
- colliding beams: electron positron
- electron positron: annihilation
- annihilation: electron positron
- Z0: electroproduction
- electroproduction: Z0
- Z0: nonleptonic decay
- nonleptonic decay: Z0
- supersymmetry
- sparticle: neutral particle
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