First look at 2017 prompt reco data and Summer 17 MC

Transcription

1 First look at 217 prompt reco data and Summer 17 MC leptons efficiency, trigger efficiency and peek at newly obtained distributions from mutau channel Yiwen Wen DESY HTT Meeting

2 Introduction datasets, samples and codes data prompt reco 217 SingleMuon and SingleElectron dataset run period 217 B-F json file corresponding to 35.9/fb: Cert_ _13TeV_PromptReco_Collisions17_JSON.txt MC Summer17 MC_v1 samples DY-5 inclusive, TTbar, W+jets stitched, WW/WZ/ZZ, single top (tw channel) code package to measure efficiency tag and probe codes developed by Alberto in DesyTauAnalyses/NTupleMaker/test/TP_216 2

3 id/iso efficiency how to measure muon id to measure medium muon id tag and probe in Z->mumu selected events fit visible mass distribution passing probe criterion: muon has medium id and isolation <.15 efficiency = #passing probe/#total probe electron id to measure MVA_WP8_general_Spring16 electron id tag and probe in Z->ee events passing probe criterion: electron has the required id and isolation <.1 examples of efficiency plots last pt > 1 GeV bin shifted to 7 GeV for beer illustration complete plots see backup 3

4 trigger efficiency IsoMu27_v* and Ele_35_WPtight_gsf_v* single muon trigger to measure IsoMu27_v* fiter name: hltl3crisol1smu22or25l1fl2f1ql3f27ql3trkisofilteredp7 tag and probe in Z->mumu events also measured IsoMu24_v* single electron trigger to measure Ele_35_WPtight_gsf_v* filter name: hltele35noerwptightgsftrackisofilter tag and probe in Z->ee events also measured Ele_27_WPtight_gsf_v* examples of efficiency plots last pt > 2 GeV bin shifted to 7 GeV for beer illustration complete plots see backup 4

5 first look at mutau channel event selections muon selections require trigger HLT_IsoMu27_v* and filter matching with offline object both in data and MC pt > 28 GeV, η < 2.1, dxy and dz cuts medium muon id, isolation <.15, isolation cone size.4 tau selections pt > 2 GeV, η < 2.3, dxy and dz cuts decay mode finding, anti-μ discriminator tight and combined Isolation loose tau id (or tight MVA id) topology cuts opposite signed mutau pair transverse mass mt_1 < 4 GeV corrections applied so far pile-up reweighing (files from Artur Goman) lepton ID and trigger scale factor 5

6 pile-up distributions.8.7 Pile-Up in MC Pile-Up in (217 B-F) Pile-Up in Run217 B Pile-Up in Run217 C 7 6 Pile-Up Distrubutions pileup Entries Mean Std Dev Pile-Up in Run217 D Pile-Up in Run217 E Pile-Up in Run217 F pile-up in different run periods and MC (plots from Artur. G) Number of PU interactions pile-up weight pile-up in different runs behaves very differently in Run217 F(blue), peak value ~ 5 pile-up weight can reach 6 in pile-up near 6 6

7 before and after apply pile-up reweighing visible mass distributions, using combined isolation loose tau id CMS L = 35.8 fb at CMS L = 35.8 fb at [GeV] [GeV] m vis 1..5 m vis [GeV] m vis 7

8 W+Jets control region control region: mt_1 > 7 W+Jets modeling shape from MC, W+Jets stitched samples re-obtain normalization factor from W+Jets dominant CR: mt_1>7 the factor is ~ 2, much higher w.r.t 216 checking mt_1 distribution in CR found that it is because of the tight MVA tau id CMS L = 36.8 fb at mt 1 [GeV] mt 1 [GeV] CMS L = 36.8 fb at mt 1 [GeV] applying tau MVA tight id without tau MVA tight id 8

9 Tau isolation MVA tight discriminator raw distribution CMS L = 35.8 fb at tau id isolation tau id isolation CMS L = 35.8 fb at tau id isolation tight WP early 217 data and 216 MC from Isobel O. 9

10 comparison between combined cut-based and MVA tau id visible mass distribution CMS L = 35.8 fb at CMS L = 35.8 fb at m_vis[gev] [GeV] m vis m_vis[gev] with cut-based loose tau id with MVA tau id 1

11 other distribution 1 CMS L = 35.8 fb at tau η [GeV] 1.5 met[gev] 1.5 decay mode tau Pt [GeV] CMS L = 35.8 fb at tau η [GeV] 1 CMS L = 35.8 fb at met[gev] CMS 3 L = 35.8 fb at 5 1 decay mode 11

12 summary leptons and trigger scale factor file new lepton id/iso scale factor and trigger scale factor for prompt reco 217 data and Summer17 MC available they are in Git-Hub: DesyTauAnalysesRun2_25ns/NTupleMaker/data/PromptReco217BCDEF_leptonSF/ first look at mutau pile-up behaves very different in different run huge discrepancy seen in MVA tau id isolation we suspect the reason is high pile-up in later run period if using cut-base tau id, agreement looks good next look at etau channel process the remaining Run F dataset, ~ 5/fb left 12

13 Back up

14 more id/iso eff. plots muon id 14

15 more id/iso eff. plots electron 15

16 more trigger efficiency plots Single Muon IsoMu27_v* 16

17 more trigger efficiency plots Ele35_WPTight_gsf_v* 17