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We consider the reaction ee ->qqQQ as a test of lepton numbernon-conservation in the framework of the left-right-symmetric electroweakmodel. The main contributions to this process are due to Majorana neutrinoexchange in t-channel and doubly charged Higgs (Delta{--}) exchange ins-channel with a pair of right-handed weak bosons (WR) as intermediate state.We show that in a linear ee collider with the collision energy of 1 TeV (1.5TeV) the cross section of this process is 0.01 fb (1 fb), and it will, for theanticipated luminosity of 10**{35} cm**{-2}, be detectable below the WRthreshold. We study the sensitivity of the reaction on the masses of the heavyneutrino, WR and Delta{--}.Comment: 24 pages, 9 eps figures, uses axodraw.st

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

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