ar X iv : h ep - p h / 99 10 46 3 v 1 2 4 O ct 1 99 9 Production of four jets in LR model †

We consider the reaction ee → q q q̄ q̄ as a test of lepton number nonconservation in the framework of the left-right-symmetric electroweak model. The main contributions to this process are due to Majorana neutrino exchange in tchannel and doubly charged Higgs (∆) exchange in s-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 (1.5 TeV) the cross section of this process is 0.01 fb (1 fb), and it will, for the anticipated luminosity of 10 cms, be detectable below the WR threshold. We study the sensitivity of the reaction on the masses of the heavy neutrino, WR and ∆ .