Inclusive Double-Pomeron Exchange at the Fermilab Tevatron p̅p Collider

We report results from a study of events with a double- Pomeronexchange topology produced in (p) over barp collisions at roots=1800 GeV. The events are characterized by a leading antiprotonand a large rapidity gap on the outgoing proton side. We find that the differential production cross section agrees in shape with predictions based on Regge theoryand factorization, and that the ratio of double- Pomeronexchange to single diffractive production rates is relatively unsuppressed as compared to the O(10) suppression factor previously measured in single diffractive production.