par Abreu, Pedro;Bertrand, Daniel ;Bricman, Claude ;Vander Velde, Catherine ;Wickens, John H. ; [et al.]
Référence Physics letters. Section B, 275, 1-2, page (222-230)
Publication Publié, 1992
Article révisé par les pairs
Résumé : We have searched for pair produced scalar leptoquarks each decaying to a quark and a charged lepton in a sample of 116 000 hadronic Z0 events produced at LEP. No candidate was detected and cross section and branching ratio limits are set for the above process at 95% CL. Mass limits are found to be about 42 GeV/c2 depending only slightly on the models used and a coupling times branching ratio exclusion line is drawn for a scalar leptoquark with a free coupling. We have also probed the mass region above 45 GeV/c2 for a singly produced scalar leptoquark and set limits on the cross section and the coupling λ2/4π up to 60 GeV.