Introduction

This page describes the detail of simple ntuple for TER (Tau Energy Resolution) study in Higgs to tautau to lephad analyses.

Please refere as standard analysis : https://twiki.cern.ch/twiki/bin/viewauth/AtlasProtected/HiggsToTauTauToLH2013Winter8TeV

Sample

Z->tautau embeeding sample:

• group.phys-higgs.ysakurai.TER_ntuple.data12_8TeV.EMBLHIM.NTUP_TAU.p1462.v02/

Z->tautau embedding (FTFP_BERT1) sample

• group.phys-higgs.ysakurai.TER_ntuple.data12_8TeV.EMBLH_FTFP_BERT1.NTUP_TAU.p1462.v02/

Selection

Standard lep-had analysis preselection is applied except for tau object selection.

Electron

Completly same as standard lep-had analysis.

Muon

Completly same as standard lep-had analysis.

Tau

• no offline Pt cut
• truth visible tau Pt > 10GeV
• BDT Medium ID
• numTrack==1||numTrack==3
• detector eta cut corresponding to prong
• |charge| == 1
• author==1||author==3
• no eveto
• no muon veto

Jet

Standard lep-had analysis cut is applied (Pt>30GeV).

Overlap Removal: muon -> electron -> tau(above selection) -> jet

Event selection

Standard Event Cleaning / Trigger Requirement / Dilepton veto

# of tau == 1 is "not" applied

Keep multiple tau events because tau pt cut is not applied here.

If you don't need such events, please simply apply tau_n==1 cut by hand.

In lepton + tau trigger case, "leading" tau pt > 25 GeV is applied

Variables

All energy variables is filled as GeV unit

Event

• RunNumber
• EventNumber
• averageIntPerXing
• NPV : number of primary vertex (Number of associated tracks >= 4 && Type == 1)
• evt_tot_weight : total event weight (contained every event weight)
• isOS : opposite sign bit between lepton and leading tau
• isSS : same sign bit between lepton and leading tau
• isSLT : single lepton trigger bit
• isLTT : lepton + tau trigger bit (leading tau pt>25GeV is required)

Truth

NOTE)

*_had_decay_mode : 0 -> 1prong , 1->3prong

*_lep_decay_mode : 0 -> electron , 1->muon

Lepton

lepton variables which is applied standard object selection

• lep_type : 0 -> electron , 1 -> muon
• lep_pt
• lep_eta
• lep_phi
• lep_m
• lep_charge

Tau

tau variables filled with vector type.

• tau_n
• tau_pt
• tau_eta
• tau_phi
• tau_charge
• tau_numTrack
• tau_BDTJetScore
• tau_BDTEleScore
• tau_BDTMedium
• tau_EleBDTMedium
• tau_MuonVeto

tau_n==1

tau_pt->at(0) > 20.0

tau_EleBDTMedium->at(0)==1

tau_MuonVeto->at(0)==1

NOTE )

Once you apply EleBDTMedium cut, offline tau pt is automatically cut by 15.0GeV. (this is feature of original tau D3PD)

Jet

jet (>30GeV) variables filled with vector type.

• jet_n
• jet_pt
• jet_eta
• jet_phi
• jet_m
• jet_JVF
• jet_MV1 : jet is b-tagged if jet_MV1 >0.7892

Missing Et

• met_Et
• met_phi
• met_sumEt
• met_Etx
• met_Ety