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 signatures for the reactions e+e- -> chi chi' and e+e- -> chi' chi' where chi is the lightest neutralino and chi' any heavier one. The data sample used for these searches corresponds to about 23000 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.
Search For Neutralino Production In Z Decays
CIOCCI, MARIA AGNESE;BATIGNANI, GIOVANNI;FERRANTE, ISIDORO;FIDECARO, FRANCESCO;FORTI, FRANCESCO;GIORGI, MARCELLO;MESSINEO, ALBERTO MARIA;TONELLI, GUIDO EMILIO;TRIGGIANI, GIUSEPPE;
1990-01-01
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 signatures for the reactions e+e- -> chi chi' and e+e- -> chi' chi' where chi is the lightest neutralino and chi' any heavier one. The data sample used for these searches corresponds to about 23000 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.File in questo prodotto:
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