CMS Performance Note

Transcription

1 Available on CMS information server CMS DP -2013/009 CMS Performance Note The content of this note is intended for CMS internal use and distribution only 27 March 2013 Single Muon efficiencies in 2012 Data CMS Collaboration Abstract Muon identification, isolation and single-muon trigger efficiencies from 2012 data are presented. The results are obtained from Z µ + µ events by the Tag-and-Probe technique.

2 Single Muon Efficiencies in 2012 Data CMS Collabora8on 1

3 Muon ID and Isola,on Efficiencies in 2012 Run ABCD 2

4 Outline Muon ID efficiencies: Tight global muon PF muon globaltrack.normalizedchi2< 10 globaltrack.numberofvalidmuonhits > 0 numberofmatchedsta8ons > 1 dxy < 0.2 cm, dz < 0.5 cm numberofvalidpixelhits > 0 trackerlayerswithmeasurement > 5 Loose PF muon global or tracker muon Isola8on efficiencies for 8ght muons: tracker rela,ve isola,on (( p T (TRK))/p T ) < 0.1 (cone ΔR=0.3) combined rela,ve PF isola,on ( E T (chhad from PV)+ E T (neuthad) + E T (photons))/p T < 0.12 and < 0.20 with dbeta correc,on for pile up (cone ΔR =0.4). DeltaBeta: Correc8on to the neutral component of the combined isola8on, taking into account the charged par8cles in the cone of interest but with par8cles not origina8ng from the primary vertex, and the average of neutral to charged par8cles as measured in jets Plot efficiencies for Data, MC and scale factors vs eta, pt (barrel, overlap, endcap), number of ver8ces 3

5 Method Method: Tag and Probe Selec8on on Z- >μ + μ - Tag muon: Tight Muon pt > 15 GeV matched to a single muon trigger Probe muon: General Track (for ID efficiencies) Tight Muon (for Isola8on efficiencies) Z mass window: GeV PDF shape: signal = sum of 2 Voig8ans background = exponen8al 4

6 Loose Selec8on Efficiency (Data and MC) and scale factors vs eta TnP method used on Zs Probes general tracks ID efficiency 5

7 Loose Selec8on Efficiency (Data and MC) and scale factors vs pt in the barrel TnP method used on Zs Probes general tracks ID efficiency 6

8 Loose Selec8on Efficiency (Data and MC) and scale factors vs pt in the overlap TnP method used on Zs Probes general tracks ID efficiency 7

9 Loose Selec8on Efficiency (Data and MC) and scale factors vs pt in the endcap TnP method used on Zs Probes general tracks ID efficiency 8

10 Loose Selec8on Efficiency (Data and MC) and scale factors vs Number of Ver8ces TnP method used on Zs Probes general tracks ID efficiency 9

11 Tight Selec8on Efficiency (Data and MC) and scale factors vs eta TnP method used on Zs Probes general tracks ID efficiency 10

12 Tight Selec8on Efficiency (Data and MC) and scale factors vs pt in the barrel TnP method used on Zs Probes general tracks ID efficiency 11

13 Tight Selec8on Efficiency (Data and MC) and scale factors vs pt in the overlap TnP method used on Zs Probes general tracks ID efficiency 12

14 Tight Selec8on Efficiency (Data and MC) and scale factors vs pt in the endcap TnP method used on Zs Probes general tracks ID efficiency 13

15 Tight Selec8on Efficiency (Data and MC) and scale factors vs Number of Ver8ces TnP method used on Zs Probes general tracks ID efficiency 14

16 Efficiency (Data and MC) and scale factors for a cut at < 0.12 for PF Combined Rela8ve Isola8on with DeltaBeta correc8on for pile up vs eta TnP method used on Zs Probes Tight Muons Isola8on efficiency 15

17 Efficiency (Data and MC) and scale factors for a cut at < 0.12 for PF Combined Rela8ve Isola8on with DeltaBeta correc8on for pile up vs pt in the barrel TnP method used on Zs Probes Tight Muons Isola8on efficiency 16

18 Efficiency (Data and MC) and scale factors for a cut at < 0.12 for PF Combined Rela8ve Isola8on with DeltaBeta correc8on for pile up vs pt in the overlap TnP method used on Zs Probes Tight Muons Isola8on efficiency 17

19 Efficiency (Data and MC) and scale factors for a cut at < 0.12 for PF Combined Rela8ve Isola8on with DeltaBeta correc8on for pile up vs pt in the endcap TnP method used on Zs Probes Tight Muons Isola8on efficiency 18

20 Efficiency (Data and MC) and scale factors for a cut at < 0.12 for PF Combined Rela8ve Isola8on with DeltaBeta correc8on for pile up vs Number of Ver8ces TnP method used on Zs Probes Tight Muons Isola8on efficiency 19

21 Efficiency (Data and MC) and scale factors for a cut at < 0.20 for PF Combined Rela8ve Isola8on with DeltaBeta correc8on for pile up vs Eta TnP method used on Zs Probes Tight Muons Isola8on efficiency 20

22 Efficiency (Data and MC) and scale factors for a cut at < 0.20 for PF Combined Rela8ve Isola8on with DeltaBeta correc8on for pile up vs pt in the barrel TnP method used on Zs Probes Tight Muons Isola8on efficiency 21

23 Efficiency (Data and MC) and scale factors for a cut at < 0.12 for PF Combined Rela8ve Isola8on with DeltaBeta correc8on for pile up vs pt in the overlap TnP method used on Zs Probes Tight Muons Isola8on efficiency 22

24 Efficiency (Data and MC) and scale factors for a cut at < 0.20 for PF Combined Rela8ve Isola8on with DeltaBeta correc8on for pile up vs pt in the endcap TnP method used on Zs Probes Tight Muons Isola8on efficiency 23

25 Efficiency (Data and MC) and scale factors for a cut at < 0.20 for PF Combined Rela8ve Isola8on with DeltaBeta correc8on for pile up vs Number of Ver8ces TnP method used on Zs Probes Tight Muons Isola8on efficiency 24

26 Efficiency (Data and MC) and scale factors for a cut at < 0.1 for Tracker Rela8ve Isola8on vs eta TnP method used on Zs Probes Tight Muons Isola8on efficiency 25

27 Efficiency (Data and MC) and scale factors for a cut at < 0.1 for Tracker Rela8ve Isola8on vs pt in the barrel TnP method used on Zs Probes Tight Muons Isola8on efficiency 26

28 Efficiency (Data and MC) and scale factors for a cut at < 0.1 for Tracker Rela8ve Isola8on vs pt in the overlap TnP method used on Zs Probes Tight Muons Isola8on efficiency 27

29 Efficiency (Data and MC) and scale factors for a cut at < 0.1 for Tracker Rela8ve Isola8on vs pt in the endcap TnP method used on Zs Probes Tight Muons Isola8on efficiency 28

30 Efficiency (Data and MC) and scale factors for a cut at < 0.1 for Tracker Rela8ve Isola8on vs number ver8ces TnP method used on Zs Probes Tight Muons Isola8on efficiency 29

31 Single Muon Trigger Efficiencies in 2012 Run D

32 Method Efficiency of triggers HLT_Mu40, HLT_IsoMu24 vs p T, η, vertex multiplicity w.r.t. tight muon ID tight muon ID: - Particle Flow (PF) && Global Muon ID - Global track's χ 2 GLB / dof < 10 - # valid muon hits > 0, # matched muon stations > 1 - Impact parameters of tracker track w.r.t. primary vertex: d xy < 0.2 cm, d z < 0.5 cm - # valid pixel hits > 0, # tracker layers with measurements > 5 Method: tag-and-probe with Z resonance tag: tight muon ID, p T > 15 GeV/c matched with HLT_IsoMu24(_eta2p1) probe: tight muon ID (only for IsoMu24 efficiency) Loose combined-relative PF isolation: [Σ E T (ch-hadr from PV) + Σ E T (neutr-hadr) + Σ E T (phot)] / p T µ < 0.2 (ΔR = 0.4) Δβ correction on neutral component, estimated using the charged particles in the isolation cone originating from non-primary vertexes, and the neutral-to-charged ratio MC: Z µµ, with pileup reweighting to observed number of reconstructed vertices

33 HLT_IsoMu24: Efficiency VS p T ( η < 0.9) HLT_IsoMu24 efficiency vs muon p T Ø data (2012 D) Ø MC Ø data/mc scale factors Probe: Ø tight muon Ø combined relative PF isolation Ø p T > 25 GeV/c Ø η < 0.9 (muon barrel, DT only)

34 HLT_IsoMu24: Efficiency VS p T ( η = ) HLT_IsoMu24 efficiency vs muon p T Ø data (2012 D) Ø MC Ø data/mc scale factors Probe: Ø tight muon Ø combined relative PF isolation Ø p T > 25 GeV/c Ø 0.9 < η < 1.2 (DT-CSC overlap)

35 HLT_IsoMu24: Efficiency VS p T ( η = ) HLT_IsoMu24 efficiency vs muon p T Ø data (2012 D) Ø MC Ø data/mc scale factors Probe: Ø tight muon Ø combined relative PF isolation Ø p T > 25 GeV/c Ø 1.2 < η < 2.1 (muon endcaps, CSC only)

36 HLT_Mu40: Efficiency VS p T ( η < 0.9) HLT_Mu40 efficiency vs muon p T Ø data (2012 D) Ø MC Ø data/mc scale factors Probe: Ø tight muon Ø p T > 45 GeV/c Ø η < 0.9 (muon barrel, DT only)

37 HLT_Mu40: Efficiency VS p T ( η = ) HLT_Mu40 efficiency vs muon p T Ø data (2012 D) Ø MC Ø data/mc scale factors Probe: Ø tight muon Ø p T > 45 GeV/c Ø 0.9 < η < 1.2 (DT-CSC overlap)

38 HLT_Mu40: Efficiency VS p T ( η = ) HLT_Mu40 efficiency vs muon p T Ø data (2012 D) Ø MC Ø data/mc scale factors Probe: Ø tight muon Ø p T > 45 GeV/c Ø 1.2 < η < 2.1 (muon endcaps, CSC only)

39 HLT_IsoMu24: Efficiency VS η (p T > 25 GeV/c) HLT_IsoMu24 efficiency vs muon η Ø data (2012 D) Ø MC Ø data/mc scale factors Probe: Ø tight muon Ø combined relative PF isolation Ø p T > 25 GeV/c η = : dips due to cracks b/w DT wheels 0 and ±1 η > 1.2: asymmetry due to CSC bad (non-operational) chambers

40 HLT_Mu40: Efficiency VS η (p T > 45 GeV/c) HLT_Mu40 efficiency vs muon η Ø data (2012 D) Ø MC Ø data/mc scale factors Probe: Ø tight muon Ø p T > 45 GeV/c η = : dips due to cracks b/w DT wheels 0 and ±1 η > 1.2: asymmetry due to CSC bad (non-operational) chambers

41 HLT_Mu40: Efficiency vs N.Vertices (p T > 45 GeV/c, η < 2.1) HLT_Mu40 efficiency vs number of reconstructed primary vertices Ø data (2012 D) Ø MC Ø data/mc scale factors Probe: Ø tight muon Ø p T > 45 GeV/c Ø η < 2.1