|The Run IIb Trigger Upgrade for the DØ Experiment|
|M. Abolins, J. Ban, J. Bystricky, D. Calvet, D. Chapin, D. Edmunds, H. Evans, L. Han, U. Heintz, M. Hildreth, R. Hirosky, K. Johns, M. Johnson, P. Laurens, P. Le Dû, J. Mitrevski, M. Narain, J. Olsen, P. Padley, J. Parsons, R. Partridge, E. Perez, W. Sippach, J. Steinberg, G. Tarte, G. Wilson, D. Wood, S. Wu|
The increase in instantaneous luminosity anticipated in Run IIb of the Tevatron collider at Fermilab requires increased background rejection capabilities from the trigger system of the DØ detector. A set of upgrades is under way to improve triggering at level 1 in the calorimeter and tracker, and at level 2 in the silicon track trigger and software triggers. Reductions of up to a factor of ten on the rates of high transverse momentum triggers are anticipated with the ugrades described.