Talks

• Review of online p12 performance with global_CMT-9.20:
  • Taus: Yann Coadou.
    On and offline physics_results are identical.
  • Tracking: Daniel Whiteson
    Differences observed probably due to the fact that different events are marked and passed in on/offline running and tracking information is available only in debug chunk?
  • Electrons: Ulla Blumenschein.
    On and offline physics_results are identical. In 1.5 sigma data (before p12 made 2.5 sigma available in L3) about 6% inefficiency from shower shape cuts.
• Tracking in vertex_examine with new p12 geometry: Michiel Sanders
  
  • CFT internal alignment has changed between p12 and p13. No huge differences observed in track distributions.
  • Need to use consistent geometry version in vertex_examine and L3 farm when we are running B-id with beam position determined by vertex_examine!
• Muon timing in p13: Martijn Mulders.
  Now that MuoSegmentLLReco_L3.rcp is used correctly then L3Muon uses about 50 ms/event. In p11 it was about 25 ms. Efficiency should still be OK.
• Muon-Track matching: Martin Wegner.
  Local muon track errors in phi were underestimated by factor ~2.5. Fixing this and in addition treating tracks with no stereo information correctly gives residual matching inefficiency reduced to about 2%. About 1% of events with offline matched track-muon and no L3 track will be supplied to Daniel to be given individual attention.

Scribe: Terry Wyatt.