Particle Physics Seminar
	Thursdaym December 16, 1999 - 11:00 AM
	Small Seminar Room

	Hard Diffraction at D0
	Andrew Brandt, U.T. Arlington

			    ABSTRACT

An introduction to Hard Diffraction is presented including current
Run I results from the DZero Collaboration and plans for a new
sub-detector to improve these studies in Run II.
Hard Diffraction refers to events with jet production along with an
absence of particles or rapidity gap in some region of the detector.
These types of events are usually associated with a leading proton, which
currently cannot be detected by the DZero detector.
Results are presented on jet production with one or two forward rapidity
gaps, topologies that are qualitatively consistent with expectations 
from hard single diffraction and hard double pomeron exchange processes, 
respectively.   Plans for the new Forward Proton Detector
being constructed by Brazil, Fermilab, NIKHEF, and UTA are also discussed.