CMS Particle Flow and Tau Identification Results

Red led This page is still maintained on a best-effort basis; please see the official CMS Publications page for a fully up-to-date list of results.

The contact details of the current conveners can be found here.

Publications in CDS

Results on new CMS public results page

Plots and Results

Latest approved results

Particle Flow

  • PRF-14-001 Particle-flow reconstruction and global event description with the CMS detector, JINST 12 (2017) P10003

Tau - Papers and Physics Analysis summaries

  • TAU-18-001 An embedding technique to determine genuine $\tau\tau$ backgrounds from CMS data, CMS Physics Analysis Summary
  • TAU-16-003 Performance of reconstruction and identification of $\tau$ leptons decaying to hadrons and $\nu_{\tau}$ in pp collisions at $ \sqrt{s} = $ 13 TeV, JINST 13 (2018) P10005
  • TAU-16-002 Performance of reconstruction and identification of τ leptons in their decays to hadrons and ντ in LHC Run-2, CMS Physics Analysis Summary
  • TAU-14-001 Reconstruction and identification of τ lepton decays to hadrons and ντ at CMS, JINST 11 (2016) P01019
  • TAU-11-001 Performance of τ lepton reconstruction and identification in CMS, JINST 7 (2012) P01001

Tau - DP Notes

There is no guarantee that the following list of DP notes is complete. You can find all tau related DP notes here.

  • DP-2019-041 Identification of hadronic tau decay channels using multivariate analysis (MVA decay mode)
  • DP-2019-039 Performance of the low-pT tau identification algorithm
  • DP-2019-033 Performance of the DeepTau algorithm for the discrimination of taus against jets, electrons, and muons
  • DP-2019-012 Tau Lepton Run 2 Trigger Performance
  • DP-2018-054 Tau reconstruction with calorimeter jets at sqrt(s) = 13 TeV
  • DP-2018-035 2018 Tau Trigger Reconstruction Comparison
  • DP-2018-026 Tau Identification Performance in 2017 Data at srt(s) = 13 TeV
  • DP-2018-009 2017 Tau Trigger Efficiencies
  • DP-2018-006 Level-1 tau trigger performance in 2017 data
  • DP-2017-036 Jet to Tau Mis-identification with 2016 pp collision data at = 13 TeV, Detector Performance Summary
  • DP-2017-035 Tau trigger commissioning on first 2017 13 TeV data
  • DP-2017-031 Tau trigger performances on 2016 13 TeV data
  • DP-2017-006 Performance of tau identification with 2016 data at = 13 TeV, Detector Performance Summary
  • DP-2017-002 Tau-Id performance with full 2016 dataset of 36.8/fb using Z→τμτh events, Detector Performance Summary
  • DP-2016-066 Expected tau identification performance in LHC run-2 at sqrt(s) = 13 TeV
  • DP-2016-060 Tau-Id performance to separate tau leptons with helicity +1 and -1 using τ→a1ν→3πν and τ→ρν→ππ0ν decays
  • DP-2016-040 Tau energy scale and μ→τ misidentification rate estimated with early 2016 data using Z events, Detector Performance Summary
  • DP-2016-038 Tau identification in boosted topologies, Detector Performance Summary
  • DP-2016-037 Tau trigger performances on 13 TeV data, Detector Performance Summary
  • DP-2016-029 Tau trigger performances at 13 TeV with 2015 data
  • DP-2016-015 Tau-Id performance with early 2016 data using Z→τμτh events, Detector Performance Summary

Trigger results

Tau trigger related results can also be found in the following TWiki pages:

  • L1 Trigger DPG TWiki link,
  • Trigger Studies Group (TSG) TWiki link.

Older plots

Figure Abbreviated Caption
Tau Efficiency Curves Efficiency of three most-common ID algorithms vs. truth pT with respect to truth-matched taus. Computed using Ztautau simulated events
Tau MVA Isolation Performance Marginal eciency-vs.-fake rate for cut-based vs. MVA isolation with respect to tau candidates passing the decay mode" selection. Efficiency from Ztautau  simulated events. Fake rate from multi-jet data
Tau MVA Isolation Motivation MVA splits isolation region into rings in DeltaR. Isolation deposits in real taus are typically from leakage (low DeltaR) or pile-up/underlying-event (high DeltaR)
Tau Energy Pileup Stability ET resolution for di fferent bins of reconstructed vertices in Ztautau simulated events. Reconstructed tau energy is nearly independent of PU
Tau Cut-based Efficiency Pileup Stability Cut-based ID efficiency versus number of reconstructed vertices. Efficiency is nearly at with respect to PU. Efficiency is defi ned with respect to truth-matched taus with visible pT > 20 GeV
Tau MVA Efficiency Pileup Stability Efficiency-vs.-fake rate for cut-based vs. MVA isolation. Efficiency from simulated Ztautau events. Fake rate from multijet data. MVA2 is a new MVA training with improved performance for high Pt taus (not shown in the plot)
Tau MVA Retraining Efficiency-vs.-fake rate for cut-based vs. MVA isolation. Efficiency from simulated Ztautau events. Fake rate from multijet data. MVA2 is a new MVA training with improved performance for high Pt taus (not shown in the plot)
Tau Invariant Mass Reconstruction Reconstructed tau invariant mass, split by decay mode. In enriched Ztautau events, using the selections in the CMS Htautau search (CMS-PAS-HIG-13-004). This variable is sensitive to the reconstruction of the tau decay mode and the tau energy scale

Efficiency to pass cut-based tau ID (HPS combined isolation 3-hit) Efficiency to pass cut-based tau ID (HPS combined isolation 3-hit), measured via Tag & probe using Z -> tautau events
Efficiency to pass MVA tau ID that uses tau lifetime information Efficiency to pass MVA tau ID that uses tau lifetime information, measured via Tag & probe using Z -> tautau events

Jet -> tau fake-rate in QCD mutl-jet events for cut-based tau ID (HPS combined isolation 3-hit) Jet -> tau fake-rate for cut-based tau ID (HPS combined isolation 3-hit), in QCD multi-jet events triggered by PFJet320 trigger
Jet -> tau fake-rate in QCD multi-jet events for MVA tau ID that uses tau lifetime information Jet -> tau fake-rate for MVA tau ID that uses tau lifetime information, in QCD multi-jet events triggered by PFJet320 trigger

Jet -> tau fake-rate vs. tau ID efficiency Jet -> tau fake-rate vs. tau ID efficiency for different tau ID discrminators (for jets in QCD multi-jet and taus in Z'(2.5 TeV) -> tautau Monte Carlo samples
Jet -> tau fake-rate vs. tau ID efficiency Jet -> tau fake-rate vs. tau ID efficiency for different tau ID discrminators (for jets in QCD multi-jet and taus in Standard Model Z -> tautau Monte Carlo samples

Most Important Approved Plots For TAU-11-001 ( click on plot to get .pdf )

Study of tau reconstruction algorithms using pp collisions data collected at sqrt(s) = 7 TeV

Link to TAU-11-001 PAS in CDS

Figure Abbreviated Caption
fig1a.png The plot shows a fraction of generated taus of a given type reconstructed in a certain decay mode for the HPS ``loose'' working point and a sample of Z to tautau simulated MC events.
fig1b.png The plot represents data to MC comparison for number of taus reconstructed in different tau decay modes using a data sample of Z to tautau to mutau events. The MC is a mixture of the signal and background MC samples based on the corresponding cross sections.
fig2a.png The visible invariant mass of the mutau system for preselected events which passed the HPS ``loose'' tau identification requirements compared to predictions of the MC simulation.
fig2b.png The visible invariant mass of the mutau system for preselected events which failed the HPS ``loose'' tau identification requirements compared to predictions of the MC simulation.
fig3a.png The expected efficiency of the tau algorithms as a function of generated visible tau pt estimated using a sample of simulated Z tautau events for the TaNC algorithm.
fig3b.png The expected efficiency of the tau algorithms as a function of generated visible tau pt estimated using a sample of simulated Z to tautau events for the HPS algorithm.
fig4a.png The reconstructed invariant mass of taus decaying into one charged and one neutral pion compared to predictions of the simulation. The black lines represent results of the fit and the dashed lines represent the predictions with tau energy scale, TauES, varied up and down by 3\%.
fig4b.png The reconstructed invariant mass of taus decaying into three charged pions compared to predictions of the simulation. The black lines represent results of the fit and the dashed lines represent the predictions with tau energy scale, TauES, varied up and down by 3\%.
fig5a.png Probabilities of quark and gluon jets to pass ``loose'' working points of the TaNC algorithm as a function of jet pt for QCD, QCD mu-enriched and W type events. Fake-rate measured in data are represented by solid symbols and compared to MC prediction represented by open symbols.
fig5b.png Probabilities of quark and gluon jets to pass ``loose'' working points of the HPS algorithm as a function of jet pt for QCD, QCD mu-enriched and W type events. Fake-rate measured in data are represented by solid symbols and compared to MC prediction represented by open symbols.
fig6.png The measured fake--rate as a function of MC estimated efficiency for all working points for QCD mu-enriched and W data samples. The PTDR points represent results of the fixed cone algorithm based on the PF taus.

Most Important Approved Plots For PFT-10-004 ( click on plot to get .pdf )

Study of tau reconstruction algorithms using pp collisions data collected at sqrt(s) = 7 TeV

Link to PFT-10-004 PAS in CDS

Figure Abbreviated Caption
Figure_001-a.png Transverse Invariant Mass of muon + Tau in Z->TauTau events
dIAdkd-Figure_002-a.gif Measured Fake Rate of theTau identification
jUh2Bw-Figure_002-b.gif Efficiency of theTau identification from Simulation

Most Important Approved Plots For PFT-10-003 ( click on plot to get .pdf )

Particle-flow commissioning with muons and electrons from J/Psi and W events at 7 TeV

Link to PFT-10-003 PAS in CDS

Figure Abbreviated Caption
PgvVtY-Figure_002-a.gif J/Psi -> ee mass peak
MR4NfM-Figure_002-b.gif Electron-Id MVA distribution
c_photon_deltaR_pre.png Distribution of Photons Around the Electrons in Simulation
Ele_MT_Figure_004-b.png Electron + MET Transverse Invariant Mass
vtpvfh-Figure_008.gif J/Psi -> mumu Invatiant Mass
Particle-Based-Isolation-Figure_011-b.png Muon Particle-based Isolation
Muon_MET_MT_Figure_012.png Muon + MET Transverse Invariant Mass

Most Important Approved Plots For PFT-10-002 ( click on plot to get .pdf )

Commissioning of the Particle-Flow reconstruction in Minimum-Bias and Jet Events from pp Collisions at 7 TeV

Link to PFT-10-002 PAS in CDS

Figure Abbreviated Caption
Pi0Mass_Figure_001.gif Pi0 reconstructed Mass
Energy_Calibration_Figure_002-a.png Calorimeter Calibration
PFMET_Cleaning_Figure_005.png Calorimeter cleaning and effect on Particle-based MET
PFSumET_DiJet_Figure_006_d.png PFSumEt in Di-Jet Events at 7 TeV
PFMET_SumET_MinBias_Figure_008-a.png PFMET divided by the PFSumEt in Minimum Bias Events at 7 TeV
PFMETRES_Vs_SumET_Figure_009-a.png PFMET Resolution Vs PFSumEt in Minimum Bias Events at 7 TeV
JetPt_Figure_010-a.png Corrected Particle-Flow Jet pT at 7 TeV
JJetComposition_Figure_011-a.png Particle-Flow Jet composition at 7 TeV
Energy_Photons_Figure_012-c.png Corrected Particle-Flow Jet pT at 7 TeV

Most Important Approved Plots For PFT-09-001 ( click on plot to get .pdf )

Particle-Flow Event Reconstruction in CMS and Performance for Jets, Taus, and MET

Link to PFT-09-001 PAS in CDS

Figure Abbreviated Caption
PFJet_Sim_Response_Figure_008-a.gif Jet Response in the Simulation
Jet_Energy_Resolution_Figure_010-a.gif Jet Energy Resolution in the Simulation

-- SimoneGennai - 09-Aug-2010

Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng 2012TauEff.png r1 manage 37.1 K 2013-11-05 - 16:25 MonicaVazquezAcosta  
PNGpng ChargedIso_pT_vs_dR.png r1 manage 66.3 K 2013-11-05 - 15:10 MonicaVazquezAcosta  
PNGpng Ele_MT_Figure_004-b.png r1 manage 16.8 K 2010-08-09 - 10:43 SimoneGennai  
PNGpng Energy_Calibration_Figure_002-a.png r1 manage 15.5 K 2010-08-09 - 12:12 SimoneGennai  
PNGpng Energy_Photons_Figure_012-c.png r1 manage 21.2 K 2010-08-09 - 14:48 SimoneGennai  
PNGpng Figure_001-a.png r1 manage 38.1 K 2010-08-09 - 10:11 SimoneGennai  
GIFgif Figure_002-a.gif r1 manage 18.6 K 2010-08-09 - 10:19 SimoneGennai  
PNGpng Figure_002-a.png r1 manage 35.6 K 2010-08-09 - 10:16 SimoneGennai  
GIFgif Figure_002-b.gif r1 manage 23.0 K 2010-08-09 - 10:20 SimoneGennai  
PNGpng Figure_002-b.png r1 manage 46.8 K 2010-08-09 - 10:19 SimoneGennai  
PNGpng JPsi-MuMu.png r1 manage 29.9 K 2010-08-09 - 10:47 SimoneGennai  
PNGpng JetComposition_Figure_011-a.png r1 manage 20.4 K 2010-08-09 - 14:46 SimoneGennai  
PNGpng JetPt_Figure_010-a.png r1 manage 22.8 K 2010-08-09 - 14:43 SimoneGennai  
GIFgif Jet_Energy_Resolution_Figure_010-a.gif r1 manage 52.2 K 2010-08-09 - 16:05 SimoneGennai  
GIFgif MR4NfM-Figure_002-b.gif r1 manage 12.6 K 2010-08-09 - 10:29 SimoneGennai  
PNGpng Muon_MET_MT_Figure_012.png r1 manage 20.5 K 2010-08-09 - 12:01 SimoneGennai  
GIFgif PFJet_Sim_Response_Figure_008-a.gif r1 manage 41.0 K 2010-08-09 - 15:49 SimoneGennai  
PNGpng PFMETRES_Vs_SumET_Figure_009-a.png r1 manage 19.2 K 2010-08-09 - 12:29 SimoneGennai  
PNGpng PFMET_Cleaning_Figure_005.png r1 manage 15.3 K 2010-08-09 - 15:12 SimoneGennai  
PNGpng PFMET_SumET_MinBias_Figure_008-a.png r1 manage 22.0 K 2010-08-09 - 12:26 SimoneGennai  
PNGpng PFSumET_DiJet_Figure_006_d.png r1 manage 16.3 K 2010-08-09 - 12:23 SimoneGennai  
PNGpng PTResOneProng1Pi0.png r1 manage 13.4 K 2013-11-05 - 15:10 MonicaVazquezAcosta  
PNGpng Particle-Based-Isolation-Figure_011-b.png r1 manage 17.5 K 2010-08-09 - 11:58 SimoneGennai  
GIFgif PgvVtY-Figure_002-a.gif r1 manage 13.5 K 2010-08-09 - 10:25 SimoneGennai  
GIFgif Pi0Mass_Figure_001.gif r1 manage 39.9 K 2010-08-09 - 12:08 SimoneGennai  
GIFgif RC_Ele_Figure_003-b.gif r1 manage 12.2 K 2010-08-09 - 10:33 SimoneGennai  
PNGpng ROC_LooseDBIso_vs_RingIso.png r1 manage 33.3 K 2013-11-05 - 15:10 MonicaVazquezAcosta  
PNGpng c_photon_deltaR_pre.png r1 manage 7.8 K 2010-08-09 - 10:39 SimoneGennai  
GIFgif dIAdkd-Figure_002-a.gif r1 manage 49.8 K 2010-08-09 - 11:54 SimoneGennai  
PDFpdf eff_Comb3.pdf r1 manage 18.2 K 2015-01-06 - 22:00 ChristianVeelken same plots in PDF format
PNGpng eff_Comb3.png r1 manage 56.7 K 2014-04-25 - 17:51 ChristianVeelken  
PDFpdf eff_MVA3oldDMwLT.pdf r1 manage 19.6 K 2015-01-06 - 22:00 ChristianVeelken same plots in PDF format
PNGpng eff_MVA3oldDMwLT.png r1 manage 66.0 K 2014-04-25 - 17:51 ChristianVeelken  
PNGpng fig1a.png r2 r1 manage 8.4 K 2012-05-23 - 22:12 AlexanderSavin  
PNGpng fig1b.png r2 r1 manage 7.7 K 2012-05-23 - 22:13 AlexanderSavin  
PNGpng fig2a.png r2 r1 manage 10.0 K 2012-05-23 - 22:14 AlexanderSavin  
PNGpng fig2b.png r2 r1 manage 9.9 K 2012-05-23 - 22:14 AlexanderSavin  
PNGpng fig3a.png r2 r1 manage 9.4 K 2012-05-24 - 10:40 AlexanderSavin  
PNGpng fig3b.png r2 r1 manage 9.7 K 2012-05-24 - 10:40 AlexanderSavin  
PNGpng fig4a.png r2 r1 manage 9.0 K 2012-05-24 - 10:40 AlexanderSavin  
PNGpng fig4b.png r2 r1 manage 8.9 K 2012-05-24 - 10:40 AlexanderSavin  
PNGpng fig5a.png r2 r1 manage 12.5 K 2012-05-24 - 10:41 AlexanderSavin  
PNGpng fig5b.png r2 r1 manage 12.5 K 2012-05-24 - 10:41 AlexanderSavin  
PNGpng fig6.png r2 r1 manage 12.7 K 2012-05-24 - 10:41 AlexanderSavin  
PNGpng hps_mva_dr.png r1 manage 72.9 K 2013-11-05 - 15:10 MonicaVazquezAcosta  
PNGpng hps_mva_roc.png r1 manage 26.2 K 2013-11-05 - 15:10 MonicaVazquezAcosta  
GIFgif jUh2Bw-Figure_002-b.gif r1 manage 62.3 K 2010-08-09 - 11:55 SimoneGennai  
PDFpdf makeTauFakeRatePlots_HPSdbCorr3Hit_evtSelQCDj_frQCDj320_jetPtM.pdf r1 manage 24.9 K 2015-01-06 - 22:00 ChristianVeelken same plots in PDF format
PNGpng makeTauFakeRatePlots_HPSdbCorr3Hit_evtSelQCDj_frQCDj320_jetPtM.png r1 manage 31.7 K 2014-04-17 - 17:42 ChristianVeelken  
PDFpdf makeTauFakeRatePlots_MVA3oldDMwLT_evtSelQCDj_forTauIdPerformanceNote_frQCDj320_jetPtM.pdf r1 manage 29.4 K 2015-01-06 - 22:00 ChristianVeelken same plots in PDF format
PNGpng makeTauFakeRatePlots_MVA3oldDMwLT_evtSelQCDj_forTauIdPerformanceNote_frQCDj320_jetPtM.png r1 manage 46.6 K 2014-04-17 - 17:43 ChristianVeelken  
PNGpng makeTauIdEffPlots2_Taus_cutIso_NumVertices.png r1 manage 29.6 K 2013-11-05 - 16:46 MonicaVazquezAcosta  
PNGpng makeTauIdEffPlots2_Taus_mvaIso_NumVertices.png r1 manage 28.7 K 2013-11-05 - 16:46 MonicaVazquezAcosta  
PNGpng makeTauIdPerformancePlot.png r1 manage 33.8 K 2013-11-05 - 15:10 MonicaVazquezAcosta  
PDFpdf makeTauIdPerformancePlot_fromSimon_Zprime.pdf r1 manage 14.3 K 2015-09-12 - 18:41 ChristianVeelken  
PNGpng makeTauIdPerformancePlot_fromSimon_Zprime.png r1 manage 27.7 K 2014-04-25 - 17:52 ChristianVeelken  
PDFpdf makeTauIdPerformancePlot_fromSimon_Ztautau.pdf r1 manage 14.3 K 2015-09-12 - 18:41 ChristianVeelken  
PNGpng makeTauIdPerformancePlot_fromSimon_Ztautau.png r1 manage 27.2 K 2014-04-25 - 17:52 ChristianVeelken  
PDFpdf tau_dps.pdf r1 manage 412.9 K 2013-11-05 - 14:53 MonicaVazquezAcosta tau DPS
PNGpng tau_mass_allmodes_es.png r1 manage 23.1 K 2013-11-05 - 15:10 MonicaVazquezAcosta  
GIFgif vtpvfh-Figure_008.gif r1 manage 35.4 K 2010-08-09 - 11:52 SimoneGennai  
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