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Performance Comparison of Flavor Tagging Variables for GLD and LDC

This brief report presents preliminary findings on comparing input variables for flavor tagging between GLD and LDC detectors. Issues with Mokka data and solutions are discussed, highlighting the tagging efficiency versus purity at the Z-peak.

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Performance Comparison of Flavor Tagging Variables for GLD and LDC

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  1. LCFIVertex with Jupiter- brief report - S. Uozumi Apr-9 2008 ACFA-sim-j meeting

  2. b b c (b-bkgr) c (b-bkgr) c FullLDCTracking, LDC01_05Sc c open: Wolf PFA full: PandoraPFA open: BRAHMS, LC-note full: MARLIN (Mokka), Si-only track cheater c-tagging performance(full tracking+Pandora+LCFIVertex, very preliminary) by Sonja, Z-pole Z-pole May 2007 GLD LDC00Sc Mar 2008

  3. Flavor-tagging input variables List of parameters used for the Flavor-tagging : D0significance of a jet Z0significance of a jet Momentum of a jet JoingProbRphi JointProbZ DecayLength DecayLengthSignificance PTCorrectedMass RawMomentum NumTracksInVertices SecondaryVertexProbability GLD LDC00Sc

  4. Status & Plans • Still comparing input variables for flavor tagging between GLD and LDC. • Problem with the Mokka data I’ve generated? Will look at Sonja’s data (only LDC01 available). • After getting reasonable conclusion with GLD and LDC00 (or LDC01), compare tagging performance with GLD, GLDprim, J4LDC.

  5. b c (b-bkgr) c open: BRAHMS, LC-note full: MARLIN (Mokka), Si-only track cheater Resulting purity vs efficiency at the Z-peak (Sonja, May 2007) • at high efficiency MARLIN(MOKKA) with “Silicon-only” track cheater gives better • performance compared to LC-note result using tracking with pattern recognition

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