Already significant Improvement for upgrade geometry even without ROC data loss CombinedSecondaryVertex b-tagging algorithm =50 with (Pixel ROC) data loss =50 no data loss CMS Upgrade Workshop, H.Improvement for b-tagging (=50, ttbar).Using MultiTrackValidator, ttbar sample, high purity tracks Fake Rate Efficiency eta Fake Rate Efficiency pT Current Pixel Geometry Phase 1 Upgrade Geometry =50 with (Pixel ROC) data loss =50 no data loss CMS Upgrade Workshop, H.Worsening of b-tagging (=50, ttbar) CombinedSecondaryVertex b-tagging algorithm Phase 1 Upgrade Geometry Current Geometry CMS Upgrade Workshop, H.Loss of efficiency for tracking (ttbar, =50, high purity tracks) Fake Rate Efficiency eta Fake Rate Efficiency pT No data loss With data loss Phase 1 Upgrade Geometry Current Geometry CMS Upgrade Workshop, H.Optimization still ongoing CMS Upgrade Workshop, H.Drop pair seeds, low pTseeds, and detached tracking steps.Tuning of tracking steps for of 50 and 100 to reduce fakes.Extra layer: quadruplet seeds and efficient triplet seeding (3-out-of-4).Tracking steps modified for upgrade geometry and high PU.Do we have new data loss numbers for redesigned ROC chip?.due to ROC/readout limitations (from TP) Study at =50 (100) for 25 (50) ns crossing time.Effect of upgrade on a physics channel (boosted ZHbb) CMS Upgrade Workshop, H.Effect of smaller pixel size/closer radius (Phase 1b).Recovery of efficiency in case of TIB inefficiency.Modified Fastsimulation for physics studies (but see later).Full (GEANT4) simulation used for tracking studies: tracking efficiency and fake rates, b-tagging studies.
Not moving releases until we have results on the ZHbb analysis for TDR.Using CMSSW release CMSSW_4_2_3_SLHCx with CMSSW_4_4_X tracking (handles high PU better).Pixel Phase 1 Physics/SimulationsHarry Cheung(Fermilab)for the Tracker Upgrade Simulations Group Focus on readiness for Physics Case for Pixel Upgrade TDR Tracking Performance Software and Computing Issues for Physics Case CMS Upgrade Workshop, H.
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