POMERONS AND JET EVENTS AT HERA

We study two and three jet events with a large rapidity gap at HERA. A s a minimal model we take the coupling of the Pomeron to the quarks an d gluons pointlike. This makes it relatively easy to construct a Monte Carlo program with which the model can be tested. The only degrees of freedom are the coupling constants of the Pomeron to the quarks or th e gluons and a cutoff procedure to keep the Pomeron-gluon coupling wel l behaved. In view of the fact that -due to detector effects- in gener al it is rather complicated to make a detailed comparison with data, t his calculation should be useful as a reference calculation for other models. (C) 1998 Elsevier Science B.V.