Search for second-generation leptoquark pairs in p̅p collisions at √s=1.8TeV

Abstract

We have searched for second-generation leptoquark (LQ) pairs in the μμ+jets channel using 94±5pb^-1 of p̅p collider data collected by the D0 experiment at the Fermilab Tevatron during 1993–1996. No evidence for a signal is observed. These results are combined with those from the μν+jets and μν+jets channels to obtain 95% confidence level (C.L.) upper limits on the LQ pair production cross section as a function of mass and β, the branching fraction of a LQ decay into a charged lepton and a quark. Lower limits of 200(180)GeV/c² for β= 1(½) are set at the 95% C.L. on the mass of scalar LQ. Mass limits are also set on vector leptoquarks as a function of β.