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Updates on the RPC trigger efficiency work with data driven method and Muon trigger efficiencies with Tag & Probe. Archana Sharma, Suman Beri Panjab University Chandigarh. Plan of talk. RPC trigger efficiencies with Data Driven method. Analysis features Brief description of method

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Archana Sharma, Suman Beri Panjab University Chandigarh

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Archana sharma suman beri panjab university chandigarh

Updates on the RPC trigger efficiency work with data driven method and Muon trigger efficiencies with Tag & Probe

Archana Sharma, Suman Beri

Panjab University

Chandigarh

India-CMS meeting TIFR, Jan. 2011


Plan of talk

Plan of talk

  • RPC trigger efficiencies with Data Driven method.

  • Analysis features

  • Brief description of method

  • Some efficiency plots

  • Summary

  • Muon trigger efficiencies with official Tag & Probe method

  • Analysis features

  • Brief description of Tag & Probe method

  • Selection cuts for Tag & Probe

  • Trigger Efficiencies plots

  • Summary

India-CMS meeting TIFR, Jan. 2011


A data driven trigger performance evaluation method

A Data Driven trigger performance evaluation method

  • GMT algorithm keeps trace of the muon sub-system which provided the candidates measurement(s)

  • Such feature can be exploited for evaluating in a data-driven fashion the trigger performance of each muon sub-system

    • By considering the trigger candidates provided by a given sub-detector using its complementary one as reference.

  • Motivation

    • Such method is relevant in cross section calculation scenarios, for trigger efficiency evaluation unbiased by MC guesses

India-CMS meeting TIFR, Jan. 2011


Analysis features

Analysis Features

  • CMSSW version : 3_8_4_patch4

  • MC sample

    /WToMuNu_TuneZ2_7TeV-pythia6/Fall10-START38_V12-v1/GEN-SIM-RAW

  • Data Sample

    /Mu/Run2010B-WZMu-v2/RAW-RECO

  • Results of the Data driven efficiencies for RPC trigger system with MC sample and real data were compared.

India-CMS meeting TIFR, Jan. 2011


Archana sharma suman beri panjab university chandigarh

  • Three types of efficiencies curves for the DT and RPC trigger system :

  • For data driven efficiency with MC and real data

    – all the events with GMT candidates provided by the DT’s in barrel

    – amongst these, the number of events with candidates provided also by RPC is counted up.

  • For Data Reco efficiency

    – all the L2 muons

    – amongst these the number of events with Candidates provided by RPC is counted up.

India-CMS meeting TIFR, Jan. 2011


Some plots of rpc trigger system efficiency with eta cuts only

Some plots of RPC trigger system efficiency with eta cuts only

|eta|<0.2, 0.33<|eta|<0.56, 0.76<|eta|<0.97

for negative muons

for positive muons

India-CMS meeting TIFR, Jan. 2011


Archana sharma suman beri panjab university chandigarh

Phi binning = 10 degree

for negative muons

for positive muons

India-CMS meeting TIFR, Jan. 2011


Archana sharma suman beri panjab university chandigarh

Pt binning = 10 GeV/c

for negative muons

for positive muons

India-CMS meeting TIFR, Jan. 2011


Archana sharma suman beri panjab university chandigarh

Applied the different sets of phi cuts for positive and negative muons to rule out the geometric cracks along different sectors in phi

for negative muons

for positive muons

India-CMS meeting TIFR, Jan. 2011


Archana sharma suman beri panjab university chandigarh

for positive muons

for negative muons

India-CMS meeting TIFR, Jan. 2011


Archana sharma suman beri panjab university chandigarh

for positive muons

for negative muons

India-CMS meeting TIFR, Jan. 2011


Summary

Summary

  • Efficiencies before applying phi cuts :

  • Efficiency after applying phi cuts :

  • Phi cuts improve the matching between the curves for MC and real data as well as the efficiencies.

  • RPC Trigger efficiency curves after cuts show flat behaviour with respect to transverse momentum except low momentum.

India-CMS meeting TIFR, Jan. 2011


Efficiencies of hlt mu9 hlt mu11 hlt mu15 triggers with tag probe

Efficiencies of HLT_Mu9 , HLT_Mu11 & HLT_Mu15 triggers with Tag & Probe

India-CMS meeting TIFR, Jan. 2011


Overview of tag and probe method

Overview of Tag and Probe Method

  • Tag and Probe method is a data-driven approach to estimate the efficiencies of the different processes which involves a particle reconstruction in a detector.

  • Very tight selection criteria: Tag

  • Paired with tag to fulfill resonance mass window: probe (loose selection criteria)

    ε= Npass/ Npass + Nfail

India-CMS meeting TIFR, Jan. 2011


Analysis features1

Analysis Features :

  • CMSSW version used : 3_8_4

  • MC sample used :

    /DYToMuMu_M-20_CT10_TuneZ2_7TeV-powheg-pythia/Fall10-START38_V12-v1/GEN-SIM-RECO

  • Data sample used :

  • /Mu/Run2010A-WZMu-Sep17Skim_v1/RAW-RECO

  •  /Mu/Run2010B-PromptReco-v2/RECO

India-CMS meeting TIFR, Jan. 2011


Selection criteria on tag probe

Selection criteria on Tag & Probe

  • Cuts on Tag :

  • Pt >20 GeV

  • |eta| < 2.1

  • Passing VBTF cuts (no isolation)

  • Cuts on Probe :

  • Pt > 20 GeV

  • |eta| < 2.1

  • Passing VBTF cuts (no isolation)

  • HLT_Mu9 – unprescaledupto run 147116

  • HLT_Mu11- unprescaledupto run 148058

  • HLT_Mu15_v1- unprescaled for all run range used in the present study

India-CMS meeting TIFR, Jan. 2011


Efficiency of hlt mu9 wrt eta for all pt range

Efficiency of HLT_Mu9 wrt eta for all Pt range

India-CMS meeting TIFR, Jan. 2011


Efficiency of hlt mu9 wrt pt for all eta range

Efficiency of HLT_Mu9 wrt Pt for all Eta range

India-CMS meeting TIFR, Jan. 2011


Efficiency of hlt mu11 wrt eta for all pt range

Efficiency of HLT_Mu11 wrt eta for all Pt range

India-CMS meeting TIFR, Jan. 2011


Efficiency of hlt mu11 wrt pt for all eta range

Efficiency of HLT_Mu11 wrt Pt for all Eta range

India-CMS meeting TIFR, Jan. 2011


Efficiency of hlt mu15 v1 wrt eta for all pt range

Efficiency of HLT_Mu15_v1 wrt eta for all Pt range

For real data

India-CMS meeting TIFR, Jan. 2011


Efficiency of hlt mu15 v1 wrt pt for all eta range

Efficiency of HLT_Mu15_v1 wrt Pt for all Eta range

For real data

India-CMS meeting TIFR, Jan. 2011


Summary1

Summary

  • Efficiencies are summarized as :

  • Significant matching between data and MC efficiency curves.

  • There is a drop in efficiency for the eta region 1.05<|eta|<1.2 which is the overlap region.

  • Drop in efficiency is more prominent for HLT_Mu9 (~70%) for both positive and negative eta regions where as for other two triggers a prominent drop is there for negative overlap region but not for positive overlap region.

India-CMS meeting TIFR, Jan. 2011


Next plans

Next Plans

RPC trigger efficiency work :

  • Further optimize the eta and phi cuts for real data.

  • Study of DT trigger system efficiency with data driven method.

    Muon trigger efficiency work :

  • Study of efficiency drop in overlap region.

  • Study of efficiency for |eta| region from 2.1 to 2.4.

  • To calculate the trigger efficiency at L1 and HLT level separately with Tag & Probe.

India-CMS meeting TIFR, Jan. 2011


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