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Search for neutralino production in Z decays

Research output: Contribution to journalJournal article

Published

<mark>Journal publication date</mark>1990
<mark>Journal</mark>Physics Letters B
Issue3-4
Volume244
Number of pages10
Pages541-550
<mark>Original language</mark>English

Abstract

Limits on Z decay branching ratios into neutralinos are reported. They were obtained from searches for monojets, acoplanar jets, acoplanar lepton pairs, single photons and acoplanar photon pairs as signaturs for the reactions e+e- → χχ′ and e+e- → χχ′, where χ is the lightest neutralino and χ′ any heavier one. The data sample used for these searches corresponds to about 23 000 events of Z decay into multihadrons, collected at LEP by the ALEPH detector for centre of mass energies at and near the Z peak. The results obtained are used to restrict the parameter space of the minimal supersymmetric standard model.