Observation of jet production in deep inelastic scattering with a large rapidity gap a HERA

摘要

Events with a large rapidity gap in deep inelastic scattering with Q(sup 2)(>=)10 GeV(sup 2) have been studied in the ZEUS detector. The properties of these events with W>140 GeV are consistent with a leading twist diffractive mechanism. In the laboratory frame, with E(sub T)(sup jet)(>=)4 GeV, 15% of the events are of the 1-jet type with negligible 2-jet production. The single jet is back-to-back in azimuth with the scattered electron. No energy flow is observed between the jet and the proton direction. With a lower jet transverse energy cut 2-jet production is observed both in the laboratory and the (gamma)(sup *)p centre-of-mass systems demonstrating the presence of hard scattering in the virtual photon interactions that give rise to large rapidity gap events. (orig.) (ERA citation 20:014266)