Journal article
Search for neutralino production in Z decays
D Decamp, B Deschizeaux, C Goy, JP Lees, MN Minard, JM Crespo, M Delfino, E Fernandez, P Mato, R Miquel, LM Mir, S Orteu, A Pacheco, JA Perlas, E Tubau, MG Catanesi, M de Palma, A Farilla, G Iaselli, G Maggi Show all
Physics Letters B | Published : 1990
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. © 1990.