Tracking in the Level 2 TriggerThe Silicon Vertex Trigger (SVT)

• Reconstructs tracks using the XFT tracks as seeds, then uses hits in the SVX II to refine the measurement.

• Performance

  • Impact parameter resolution = 35 mm
  • DPT/PT2 = 0.3%
  • f resolution = 1 mrad

• Allows triggering on displaced tracks

  • Big gain for B-Physics

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