A silicon track trigger for the DO experiment

The design of a processor to trigger on long-lived particles (e.g. b-quarks ) for the DO experiment at the Fermilab Tevatron is presented. This device reconstructs the trajectory of the charged particles in the DO tracking sys tem, which consists of a central fiber tracker and a silicon microstrip tra cker. The r-phi impact parameter resolution of the fitted tracks is about 4 0 mu m. This enables the identification of the long-lived b-quarks produced in the decays of various particles, e.g. the top quarks, Higgs Boson, tech ni-particles and other exotic particles produced in p (p) over bar collisio ns at the Tevatron. In this report we describe the design of the architectu re and algorithms for the Silicon Track Trigger. (C) 2000 Elsevier Science B.V. All rights reserved.