Top Electrons

Plan

Produce EJETS/TTDIL bottom line numbers of

• Top signal
• WJets/WJets and QCD background as appropriate

For the following electron IDs and show results in the form of a plot

• Y axis - signal yield (with appropriate error bars)
• X axis - background yield (with appropriate error bars)

Actions for me

• Ensure that all of these IDs become easily accessible in CMSSW

Common denominator

• Apply and document your usual analysis selection when reporting results...
• Remember to include d0 and conversion rejection!

Electron IDs to apply

CIC

• The CIC ID uses many variables. Instructions on how to get a decision from CMSSW are given here
  • https://twiki.cern.ch/twiki/bin/view/CMS/SWGuideCategoryBasedElectronID#CMSSW_35X_and_CMSSW_36X
  • If possible, compute results for as many of the operating points as possible, but at least to start with Loose and Tight.
• List of variables used (decision)
  • Et
  • eSeed/pIn
  • fbrem
  • H/E
  • sigmaIEtaIEta
  • dEtaIn
  • dPhiIn
  • missinghits (for 3_1_X not needed to be implemented)
  • tkIso, ecalIso, hcalIso (cone sizes?)
  • d0 corrected for beamspot or vertex (in MC it doesn't matter, but be careful!)

• List of variables used not in the above list (classification)
  • E/P (E is super cluster energy, P is pin)

VBTF

• There is currently no implementation in CMSSW for this ID, however, for these test studies it can easily be implemented in an analyzer / ntuple looper. The selection cuts on simple variables in the EE and EB.
  • sigmaIEtaIEta
  • H/E
  • dEtaIn
  • dPhiIn
  • RelIso (note different definition in the EB and EE)
    • EB - Relative Isolation = sum ( Max(EcalIso - 1, 0) + hcalIso + tkIso) / pT
    • EE - Relative Isolation = sum ( EcalIso + hcalIso + tkIso) / pT

VBTF ID defined for different efficiency working points - which I round to the nearest 5%.

Relative combined isolation under Dave's definition 
---------------------------------------------------------------------------

BARREL       0.937       0.895       0.853       0.812       0.703       0.562
    cIso   4.0e-01  |  2.0e-01  |  1.5e-01  |  1.2e-01  |  8.0e-02  |  6.0e-02  |
   sihih   1.0e-02  |  1.0e-02  |  1.0e-02  |  1.0e-02  |  1.0e-02  |  1.0e-02  |
     dfi   8.0e-01  |  9.0e-02  |  6.0e-02  |  4.0e-02  |  4.0e-02  |  2.0e-02  |
     dhi   8.0e-03  |  8.0e-03  |  8.0e-03  |  8.0e-03  |  4.0e-03  |  4.0e-03  |
     hoe   5.0e-01  |  6.0e-02  |  4.0e-02  |  4.0e-02  |  4.0e-02  |  4.0e-02  |
ENDCAPS
    cIso   3.0e-01  |  1.5e-01  |  1.2e-01  |  9.0e-02  |  4.0e-02  |  4.0e-02  |
   sihih   3.0e-02  |  3.0e-02  |  3.0e-02  |  3.0e-02  |  3.0e-02  |  2.5e-02  |
     dfi   7.0e-01  |  7.0e-01  |  3.0e-02  |  2.5e-02  |  2.5e-02  |  2.5e-02  |
     dhi   1.2e-02  |  8.0e-03  |  8.0e-03  |  6.0e-03  |  4.0e-03  |  2.0e-03  |
     hoe   7.0e-02  |  3.0e-02  |  2.5e-02  |  2.5e-02  |  2.5e-02  |  7.0e-03  |

Accessing the IDs

-- DaveEvans - 29-Apr-2010