The document summarizes the status of the B-physics trigger working group. It discusses various B-physics trigger selections being studied at Level 2 and the event filter, including tighter cuts being applied to improve rate reduction. Future work is outlined, such as robustness studies, algorithm development, and investigations using new detector layout simulations and data sets.

6. Effect of higher muon p T threshold: D s (KK)  trigger Study by Innsbruck of impact of raising muon p T threshold on D s (KK)  trigger Signal efficiency falls of fairly rapidly, more rapidly than background.

10. LVL2 Robustness Studies Misalignment (  m) Misalignment (  m) 1 10 100 1000 1 10 100 1000 90 80 70 60 50 40 Efficiency (%)  D s (MeV) 60 40 20 Effect of Pixel Barrel Misalignment on B(  ) trigger Effect of SCT barrel Misalignment on D s (  (KK)  ) trigger Fraction of Hits/Spacepoints deleted 60 50 40 30 Efficiency (%) 0.001 0.01 0.1 Effect of inefficiency on D s (  (KK)  ) trigger Pixel Barrel 15 30 Endcap 50 100 Limits on R  precision (  m) for signal loss <2% <5% SCT Barrel 60 100 Endcap 80 100

15. B-trigger Workplan 2002 2001 Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Pythia studies EF: B  (X) full sim. studies EF Timing Timing for B selection J/  , TRT Robustness EF Robustness studies Algorithm develop. Pixel scan incl. SCT LVL2 vertexing Studies in New f-w cTrig Functionality New s/w Reconstruct e in RoI from ID Reconstruct  in RoI from ID repr. TP results verify TP - new layout add LVL1 + LVL2 mu TP results + mu Full B-menu ID sngl prt Dataset Prd. New layout Sig. & bg all det.