PI/LHCb presentation - LHCb - Cern

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- Tag and Prob method using K s and J/Ψ Tracking Efficiencies slightly lower efficiency in data than in MC (related to residual misalignment, ..) - 4% systematic uncertainties per track (for all phase space) - aim for correction + 1-2% uncertainty Stephanie Hansmann-Menzemer 102 nd LHCC Meeting, 07.07.2010 18
D → Kπππ D → Kπ Tracking Efficiencies ε(track) 2 ε(track) ~ N(Kπππ)/N(Kπ) * BR(Kπ)/BR(Kπππ) 2 ~ N(Kπππ)/N(Kπ) * BR(Kπ)/BR(Kπππ) L = 2.7 nb -1 L = 2.7 nb -1 data Monte Carlo ε(data)/ε(Monte Carlo) = 1.00 ± 0.03 precisely known ± 2% Stephanie Hansmann-Menzemer 102 nd LHCC Meeting, 07.07.2010 19
Page 1 and 2: Tracking Report Stephanie Hansmann-
Page 3 and 4: Trigger and Data Taking Stephanie H
Page 5 and 6: Pile-up system Calorimeter Muon sys
Page 7 and 8: HLT1 minimum bias HLT1 physics pass
Page 9 and 10: GRID-Computing data successfully sh
Page 11 and 12: Vertex Locator precision measuremen
Page 13 and 14: new alignment including z translati
Page 15 and 16: Silicon Tracker IT 98.6% of channel
Page 17: Invariant Mass Resolution Very prec
Page 21 and 22: Muon ID Performance MuonID efficien
Page 23 and 24: Electron Identification J/ψ→ ee
Page 25 and 26: RICH 1: aerogel Single Photon Resol
Page 27 and 28: D * →D°(Kπ)π L = 2.7 nb -1 RIC
Page 29 and 30: Luminosity Measurement (some modifi
Page 31 and 32: 900 GeV 7 TeV Strange Hadron Ratios
Page 33 and 34: - clear contribution from D from b
Page 35: LHCb in very good shape! Conclusion

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