Difference between revisions of "HSG2"

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This page is intended to keep track of the Nikhef contributors to the Higgs Subgroup 2 (HSG2) at CERN:
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This page is intended to keep track of the Nikhef contributors to the Higgs Subgroup 2 (HSG2).  
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Usefull things as AMA tags and or samples used will be listed here for future reference.
 
  
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To make Frank sleep better our twiki is located in our area at CERN [https://twiki.cern.ch/twiki/bin/viewauth/Atlas/NikhefHZZ CERN HSG2 Nikhef twiki]
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Links to relevant twiki websites:
 
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https://twiki.cern.ch/twiki/bin/view/AtlasProtected/HiggsZZstar
 
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https://twiki.cern.ch/twiki/bin/view/AtlasProtected/H4lBaselineAnalysis
 
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November 2009 it was decided that the SM EW group and the HSG2 should apply the following
 
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Common Selections for their analyses:
 
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(http://indico.cern.ch/getFile.py/access?contribId=0&resId=0&materialId=slides&confId=65225)
 
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/////////////////////////////////////////////////////////////
 
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COMMON SELECTION
 
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/////////////////////////////////////////////////////////////
 
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  1. Preselection:
 
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  - Loose electrons (Author = 1 || 3), pT>5 GeV, |eta|<2.47
 
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  - Staco Muons:
 
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      Combined+LowPt with pT>5 GeV, |eta|<2.5
 
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      and Standalone with pT>5 GeV for 2.5<|eta|<2.7
 
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  2. Kinematics:
 
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  - Electrons: two Loose electrons with pT>20 GeV, others Medium
 
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  - at least 4 leptons with pT>5 GeV
 
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  3. Lepton pairing:
 
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  - at least 2 (l+,l-) pairs (same flavor, opposite sign)
 
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  Loop over all 4l-combinations:
 
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  4.) DeltaR_ll > 0.1 between each two leptons
 
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  5.) Loose isolation: [Sum ET(DR=0.3)]/pT<0.5
 
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  6.) Loose Z-mass cuts:
 
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      - m12=(70 to 110)GeV\
 
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      - m34>20 GeV for ZZ*, m34=(70 to 110)GeV for ZZ
 
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//////////////////////////////////////////////////////////////
 
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ADDITIONAL HSG2 SPECIFIC CUTS TO BE APPLIED ON TOP OF THAT
 
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//////////////////////////////////////////////////////////////
 
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  8.) Tighter pT-cut on leptons, each lepton pT>7 GeV
 
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  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
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  Up to here, all 4l-combinations are looped over.
 
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  After this, the best 4l-combination can be selected.
 
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  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
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  9.) Select the best 4l-combination:
 
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  m12=min(m_l1l2, mZ); m34=max(m_l3l4)
 
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  10.) Tighter Z-cuts
 
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  Depending on mH, same cuts as for CSC note.
 
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  11.) Tighter lepton isolation
 
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  - [Sum ET(DR=0.3)]/pT<0.33 for muons,
 
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    [Sum ET(DR=0.3)]/pT<0.44 for electrons
 
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  12.) No track isolation for the moment.
 
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  13.) No IP cut for the moment.
 
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  14.) Mass window cut, same as for CSC.
 
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The H4l baseline analysis twiki mentions the relevant samples to be:
 
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sample name        Dataset number
 
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  H->4l                105300
 
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  ZZ->4l                109292
 
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  ttbar->4l            109341
 
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  bb(z->ee)+0p          109400
 
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          +1p          109401
 
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  bb(z->mm)+0p          109405
 
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          +1p          109406
 
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  Z->ee (inclusive)    106050
 
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  Z->mumu (inclusive)  106051
 
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To search for AODs of these samples on the Grid, do for example:
 
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dq2-ls "mc*105300*AOD*"
 
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To narrow it down a bit only look for 'merge' and containers '/':
 
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dq2-ls "mc*105300*merge*AOD*/"
 

Latest revision as of 11:32, 4 April 2012

This page is intended to keep track of the Nikhef contributors to the Higgs Subgroup 2 (HSG2).

To make Frank sleep better our twiki is located in our area at CERN CERN HSG2 Nikhef twiki

Retrieved from "https://wiki.nikhef.nl/atlas/index.php?title=HSG2&oldid=4839"