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WW event selection with new Electron ID in 2011 data

WW event selection with new Electron ID in 2011 data. S. Li 1,2 , Y. Liu 1 E. Monnier 2 , Z. Zhao 1 Center of Particle Physics and Technology, University of Science and Technology of China 1 & Centre de Physique des Particules de Marseille, CNRS/IN2P3 2. NEWS FOR 2011 ANALYSIS.

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WW event selection with new Electron ID in 2011 data

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  1. WW event selection with new Electron ID in 2011 data S. Li1,2, Y. Liu1 E. Monnier2, Z. Zhao1 Center of Particle Physics and Technology, University of Science and Technology of China1 & Centre de Physique des Particules de Marseille, CNRS/IN2P32

  2. NEWS FOR 2011 ANALYSIS • No need to apply Electron Energy rescale for 2011 data (Rel 16.6): • https://twiki.cern.ch/twiki/bin/view/AtlasProtected/EnergyScaleResolutionRecommendations#2011_data_Release_16_6 • No need to apply Jet OffsetEtaJES correction for 2011 data if >16.6.1 release, no new JetUserGuide available. Jet_*OriginEM yielding 0 value for both 2011 data and mc10, need consulting the latest MC10 approximation in the latest JetUserGuide version: • https://svnweb.cern.ch/trac/atlasgrp/browser/CombPerf/JetETMiss/JetUserGuide/tags/JetUserGuide-00-01-01/AtlasJetUserGuide.pdf • New WW baseline heading for pLHC using 2011 data only: • https://twiki.cern.ch/twiki/bin/view/AtlasProtected/BaslinecutsforWWatPLHC

  3. New Events in 2011 data by WW baseline selection • Both tight and medium+iso+Blayer electron ID spotted the same 9 events in black • Green colored: events came up when increasing the jet pt threshold for tight • Yellow colored: events came up when increasing the jet pt threshold for medium

  4. WW selection on 2010 reprocessed data and MC10 with bunch train pile-up: new caloIso (caloIso98), reweight NOT applied

  5. WW selection on 2010 reprocessed data and MC10 with bunch train pile-up: Medium++ + old Isolation(etcone30<6GeV)

  6. WW selection on 2010 reprocessed data and MC10 with bunch train pile-up: Medium++ + new caloIso (caloIso98)

  7. ee channel: METrel (2010, 35.2pb-1) Medium++ + Iso tight Medium + Iso + BLAyer

  8. ee channel: Di-lepton pT (2010, 35.2pb-1) Medium++ + Iso tight Medium + Iso + BLAyer

  9. ee channel: Di-lepton inv. mass (2010, 35.2pb-1) Medium++ + Iso tight Medium + Iso + BLAyer

  10. eµ channel: METrel (2010, 35.2pb-1) Medium++ + Iso tight Medium + Iso + BLAyer

  11. eµ channel: Di-lepton pT (2010, 35.2pb-1) Medium++ + Iso tight Medium + Iso + BLAyer

  12. eµ channel: Di-lepton inv. mass (2010, 35.2pb-1) Medium++ + Iso Medium + Iso + BLAyer tight

  13. Pile-Up effects in 2011 data:Using Zmumu sample (Without JES correction) 2011 2010

  14. Pile-Up effects in 2011 data:Using Zmumu sample (With JES correction) 2011 2010

  15. Jet Multiplicities w.r.t. various NVtx bin:2010 normalized to 2011(Without JES correction)

  16. Jet Multiplicities w.r.t. various NVtx bin:2010 normalized to 2011(With JES correction)

  17. Data-driven Wjets background estimation: fake factor estimation

  18. Electron Tight ID: FakeRatepT dependence

  19. Electron Tight ID: FakeRate MET dependence

  20. Electron Medium+iso+BLayer ID: FakeRatepT dependence

  21. Electron Medium+iso+BLayer ID: FakeRate MET dependence

  22. Electron Medium++ ID(with new isolation): FakeRatepT dependence

  23. Electron Medium++ ID(with new isolation): FakeRate MET dependence

  24. Electron Medium++ ID(with old isolation): FakeRatepT dependence

  25. Electron Medium++ ID(with old isolation): FakeRate MET dependence

  26. WW selection exercise in 2011 data:Jet Multiplicities

  27. WW selection exercise in 2011 data:Jet Multiplicities(with 30GeV pT Threshold)

  28. ee channel: METrel tight Medium + Iso + BLAyer 11.6pb-1 tight Medium + Iso + BLAyer 35.2pb-1

  29. ee channel: Di-lepton pT tight Medium + Iso + BLAyer 11.6pb-1 tight Medium + Iso + BLAyer 35.2pb-1

  30. ee channel: Di-lepton inv. mass tight Medium + Iso + BLAyer 11.6pb-1 tight Medium + Iso + BLAyer 35.2pb-1

  31. eµ channel: METrel tight Medium + Iso + BLAyer 11.6pb-1 tight Medium + Iso + BLAyer 35.2pb-1

  32. eµ channel: Di-lepton pT Medium + Iso + BLAyer tight 11.6pb-1 tight Medium + Iso + BLAyer 35.2pb-1

  33. Spare

  34. eµ channel: Di-lepton inv. mass tight Medium + Iso + BLAyer 11.6pb-1 tight Medium + Iso + BLAyer 35.2pb-1

  35. Summary and Future work • All with bunch train pile-up MC10 samples with no reweighting applied • An impression of dramatic background enriching due to the medium+iso+Blayer for Electron ID mainly from Wjets, more intensive study needed to be done as soon as possible(Medium++? Need to be cross-checked with John Alison) • Accurate estimation needs to be done using data-driven(Wjets, DY background etc.)

  36. µµ channel: METrel Medium + Iso + BLAyer tight 11.6pb-1 tight Medium + Iso + BLAyer 35.2pb-1

  37. µµ channel: Di-lepton pT tight Medium + Iso + BLAyer 11.6pb-1 tight Medium + Iso + BLAyer 35.2pb-1

  38. µµ channel: Di-lepton inv. mass tight Medium + Iso + BLAyer 11.6pb-1 tight Medium + Iso + BLAyer 35.2pb-1

  39. Status • Using New Medium+iso+Blayer Electron ID study presented by Jochen Hartert: • https://indico.cern.ch/getFile.py/access?contribId=1&resId=0&materialId=slides&confId=117360 • New Electron ID selection introduced recently(not optimized): • egammaPID::ElectronMedium_WithTrackMatch (*Note that:el_loose, el_medium, el_tight available for 2011 egamma D3PD) • New Electron Isolation correction applied: (OLD: etcone20_pt_corrected<4GeV, not in d3pd, need to be re-calculated) • https://svnweb.cern.ch/trac/atlasusr/export/30076/mfiascar/WjetsD3PDskimming/trunk/IsoCorrection.h (NEW: caloIso98, using dedicated el_isIso mask (based on etcone30/ET, bin-by-bin tuned, flatter efficiency,better QCD rejection power) • http://alxr.usatlas.bnl.gov/lxr-stb5/source/atlas/Reconstruction/egamma/egammaInterfaces/egammaInterfaces/egammaIsolationMVATopToolDefs.h • egammaPID::TrackBlayer_Electron as Blayer requirement instead of simply NBLHits>0 if any hits are expected • Electron/Muon MC10 smearing applied(Job Running, ~100 MC samples!) • Using the same random seeding policy for electron and muon: Rndm_seed = 680049+EventNumber+index*100 • Using ERescaler Tool for Electron smearing and refer to MCP release 16 smearing recommendation: • https://twiki.cern.ch/twiki/bin/view/AtlasProtected/MCPAnalysisGuidelinesRel16#AnchorResolutions • PileUp reweighting for mc10? Not yet, currently using non-pileup MC. • Different reweighting for e and µ, need to be discussed (mainly due to period difference) • Tested w/ and w/o rel15 reweighting, no dramatic impact! • Running on bunch train pile-up samples also, not yet finished • https://twiki.cern.ch/twiki/bin/view/AtlasProtected/WZGroupInclusiveMeasurement

  40. Some words about Jet selection in Rel.16 • OffsetEtaJES correction required for both data and MC suggested by Jet experts: (Toshi Sumida & CaterinaDoglioni) • https://svnweb.cern.ch/trac/atlasgrp/browser/CombPerf/JetETMiss/JetUserGuide/tags/JetUserGuide-00-01-01/AtlasJetUserGuide.pdf • Not optimal especially for bunch train pile-up MC • Negative Energy *full scaled* jets need to be cleaned due to a D3PDmaker level bug. (Mainly in forward region?) • EtaOriginEM, PhiOriginEM, MOriginEM mostly(?) yield 0 in current MC samples as well as in 2011 data(?), should refer to the latest ATLAS Jet User guide so as to approximately recover them(the one on Jet/Etmisstwikiis obsolete!)

  41. Jet Multiplicities from data w/ tight w/medium Electron ID 7 new candidates spotted w/ old Iso, 2 disappeared w/ new caloIso98

  42. Interesting New Candidates Yellow: killed with NEW caloIso98 Electron ID!

  43. MET_rel distribution w/ tight and w/medium+newiso+blayer Electron ID

  44. pT(ll) distribution w/ tight and w/medium+newiso+blayer Electron ID

  45. Inv.M(ll) distribution w/ tight and w/medium+newiso+blayer Electron ID

  46. Some preliminary results from MC10:with OLD caloIso (etcone20_pt_corrected)

  47. Some preliminary results from MC10:with new caloIso (caloIso98)

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