Important steps

1. Having a code working on data and MC. Integrating GRL and trigger information.

2. Being able to match data/mc for all variables or at least main shower shape variables.

3. Do studies on isEM variables and cuts

Help optimizing (efficiency, rejection) electron identification (from electron candidates in the Electron Container) for electrons with very high pt. The electron candidates in the ESD have passed the three trigger stages and undergone offline reconstruction/reprocessing.

4. Do trigger efficiency studies with Tag And Probe (possible to extrapolate?)

  1. Which Trigger?
  2. How to include?

Useful links

Twikis :
Lepton+X : https://twiki.cern.ch/twiki/bin/view/AtlasProtected/LeptonXSubgroup
Very high pt electron : https://twiki.cern.ch/twiki/bin/view/AtlasProtected/VeryHighPtElectronStudies
Egamma : https://twiki.cern.ch/twiki/bin/view/AtlasProtected/ElectronGamma
Particle identifcation,isEMflags : https://twiki.cern.ch/twiki/bin/view/AtlasProtected/ElectronReconstruction#PID_variables
EGamma ESD : https://twiki.cern.ch/twiki/bin/view/AtlasProtected/EgammaESD

Links to Ntuple dumper form Wisconsin.

https://twiki.cern.ch/twiki/bin/view/AtlasProtected/LeptonXNtDumper
https://svnweb.cern.ch/cern/wsvn/atlasgrp/Physics/Exotic/LeptonX/Tools/trunk/ntDumper/#path_Physics_Exotic_LeptonX_Tools_trunk_ntDumper_
https://svnweb.cern.ch/cern/wsvn/atlasgrp/Physics/Exotic/LeptonX/#path_Physics_Exotic_LeptonX_

Talk that contains used dataset
http://indico.cern.ch/conferenceDisplay.py?confId=83136

Expected first trigger menu :
https://twiki.cern.ch/twiki/bin/view/Atlas/TriggerPhysicsMenu
http://olya.web.cern.ch/olya/menu/view_menu.php?name=MC_lumi1E31_simpleL1Calib&flavor=15.5.X.Y-VAL&nightly=rel_0&tags=&project=AtlasP1HLT
https://twiki.cern.ch/twiki/bin/view/Atlas/L31TriggerMenu#e_Gamma

SVN:
https://twiki.cern.ch/twiki/bin/view/Atlas/SoftwareDevelopmentWorkBookSVN#Access_to_the_SVN_repositories
link to MSU svn directory: https://svnweb.cern.ch/trac/atlasgrp/browser/Institutes/MSU

TagInfo https://twiki.cern.ch/twiki/bin/view/Atlas/CoolProdTags https://twiki.cern.ch/twiki/bin/view/Atlas/AtlasGeomDBTags

electron variables (only the ones from AOD that need some explanation see also https://twiki.cern.ch/twiki/bin/view/AtlasProtected/EgammaAOD)

author - Algorithm used to create the electron: unknown=0, egamma=1, softe=2

cluse - cluster energy

d0 - Transverse impact parameter d0 d0err d0significance d0pvtx ???

e233 - uncalibrated energy (sum of cells) of the middle sampling in a rectangle of size 3x3 (in cell units eta X phi)

e237 - uncalibrated energy (sum of cells) of the middle sampling in a rectangle of size 3x7 (in cell units eta X phi).

e277 - uncalibrated energy (sum of cells) of the middle sampling in a rectangle of size 7x7 (in cell units eta X phi).

e2tsts1 - energy of the cell corresponding to second energy maximum in the first sampling

emins1 - energy reconstructed in the strip with the minimal value between the first and second maximum

etaBE2 - cluster()->etaBE(2) - ???

ethad - transverse energy in the hadronic calorimeters behind the cluster

ethad1 - transverse energy in the first sampling of the hadronic calorimeters behind the cluster

f1 - E1/E -- fraction of energy reconstructed in the first sampling with E1 the energy reconstructed in all strips belonging to the cluster and E the total energy reconstructed in the electromagnetic calorimeter cluster.

f1core - E1(3 1)/E -- fraction of the energy reconstructed in the first longitudinal compartment of the electromagnetic calorimeter with E1(3 1) the energy reconstructed in 3 strips in η, centered around the maximum energy strip and E the energy reconstructed in the electromagnetic calorimeter

f3core - E3(3 3)/E -- fraction of the energy reconstructed in the third compartment of the electromagnetic calorimeter. The E3(3 3) energy in the back sampling is the sum of the energy contained in a 3 3 window around the maximum energy cell

fracs1 - shower shape in the shower core : [ E( 3) - E( 1)]/E( 1), where E( n) is the energy in n strips around the strip with highest energy

hasTrack - presence of charged track in the Inner Detector

iso - new name: R33over37allcalo : 1- ratio of energy in 3x3 over 3x7 cells; E(3x3) = E0(1x1) + E1(3x1) + E2(3x3) + E3(3x3); E(3x7) = E0(3x3) + E1(15x3) + E2(3x7) + E3(3x7)

pos7 - Difference between the track and the shower positions: ∑i=im-7i=im+7Ei (i-im) /∑i=im-7i=im+7Ei. The difference between the track and the shower positions measured in units of distance between the strips, where im is the impact cell for the track reconstructed in the inner detector and Ei is the energy reconstructed in the i-th cell in the η direction for constant φ given by the track parameters.

trkPt - pt of track particle

trkiso20 - trackIsolationEnergy( trackPar,0.2, true) - ???

weta1 - shower width using three strips around the one with the maximal energy deposit : ω3 strips = √{∑ Ei ( i-imax)2 / ∑ Ei}, where i is the number of the strip and imax the strip number of the most energetic one

weta2 - the lateral width is calculated with a window of 3 5 cells using the energy weighted sum over all cells, which depends on the particle impact point inside the cell: ωη 2 = √ (∑ Ei η2)/(∑ Ei) -((∑ Ei η)/(∑ Ei))2, where Ei is the energy of the i-th cell

widths2 - same as egammaParameters::weta2 but without corrections on particle impact point inside the cell

wtots1 - shower width determined in a window corresponding to the cluster size (a maximum of ΔηΔφ = 0.0625 ~0.2, corresponding typically to 40 strips in η) : ωtot1=√{∑ Ei ( i-imax)2 / ∑ Ei}, where i is the strip number and imax the strip number of the first local maximum

z0 - measuredPerigee()->parameters()[Trk::z0] - ???

z0pvtx - ???

-- SarahHeim - 23 Feb 2010
Topic revision: r7 - 14 Apr 2010, SarahHeim
 

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