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MC samples

  • Pythia Z-> leplep inclusive
    • Z->ee: 5144 /castor/
    • Z->mumu: 5145 /castor/
    • Z->tautau: 5146 /castor/
  • Higgs group Z+jets Loose samples:
    • generation conditions:
      • Parton CUT Pt>20GeV eta < 6
      • Factorization Q^2=Mz^2+sum_Pt^2_of jet (but due to ALPGEN bug Factorization Q^2=Mz^2+ (Pt^2_of Z))
      • renormalization each PT
      • PT_lep>5GeV eta < 3
      • Mll=40-200GeV
    • Event Filter:
      • ele or mu: N>=2(ee,mumu)>=1(tautau) with Pt>10GeV, |eta|<2.7
      • truth jet(Cone4TruthJets): N>=1 with Pt>20GeV, |eta|<5.0
    • Information: ZplusJetsAlpgen
    • ID 8130 .... 8135 (0 jets .... >=5 jets)
    • atlfast samples: /castor/
  • Alpgen Susy background: Z->nunu
    • Information: ZplusJetsAlpgen
    • ID: 8124 ... 8129
    • atlfast samples (directory contains also other SUSY background ): /castor/

TTbar-> tau

MC samples

  • Top MC samples are defined here. Any sample reconstructed with release 11 can found at panda monitor. Production with release 12 is on going, not much was produced until now (for Top analysis), however some few AODs were reconstructed by Elzbieta, and can be found at:
    • W->e nu: 5104 = /castor/
    • Z->tautau: 5188 = /castor/
    • ttbar: 5200 = /castor/
    • single top: 5501 = /castor/
  • And replicated at pic at:
    • /nfs/atlas-data03/cosuna/official_data/cscpre12/csc11.005200.T1_McAtNlo_Jimmy.digit.RDO.v11004205
  • As the statistics for rel12 is not enough, we reconstructed more events (running on rel11 digit files) and placed them under:
    • /nfs/atlas-data03/cosuna/official_data/cscpre12/csc11.005200.T1_McAtNlo_Jimmy.digit.RDO.v11004205_IFAE
  • Ntuples produced with the leptonic W's daughter-number fix are placed under:
    • /nfs/atlas-data03/fiorini/cspre12/ntuples has been obtained merging the 2 other files.

TopView ntuples

  • For a full description of ntuple variables: Truth, Reco
  • release 11. Large TopView athena aware ntuples were produced with release 11.
  • release 12. Few files were produced for release 12 (and TopView-00-12-xx ) for validation. With this release two types of AAN are being generated, depending on the type of tau identification algorithm used (tauRec or tau1p3p):
    • /castor/


B tagging is done by default combining the results of 2 different algorithms: IP3D and SV1.
  • IP3D calculates with tracks informations the 3-D impact parameter (d) of a b vertex candidate and its significance: s = d/sigma(d).
  • SV1 reconstructs secondary vertices in the BJet. SV1 algorithm uses a bottom-up approach: it fits vertices with all pairs of tracks, retaining the fit with the highest probability and fitting the remaining tracks of the jet to this vertex. All tracks below a certain fit probability will be rejected. A likelihood variable is calculated with the secondary vertex parameters (mass, fit probability, multiplicity and distance from the reconstructed primary vertex).
  • The two informations are summed in a bjet weight variable, that is variable used to discriminate bjets from other jets. The standard cut on the weight is at value of 3 (b-tagged jets having a weight greater than 3). The cut can be changed in TopView inside python/ . The default tagging algorithm has an efficiency of 60% and a Rejection factor for light jets of 240 in ttjjenu and ttH events.
  • More details are available at BTagging Homepage and the main BTagging algorithm is in CVS under: PhysicsAnalysis/JetTagging/JetTagAlgs/BTagging
  • ...

EV groupArea at PIC.

The PAT group is continuosly developing and applying patched to official atlas releases, even when the release is out. Therefore they make use the so called groupArea, where they install updates packages that will overload the default packages to be found in the release. In order to use the latest EV, SUSYView, TopView,... we need to install a given EVTag at PIC (exactly in the same way as they do in groupArea at CERN). There are several ways one can do that (consult here), but the easiest and faster is to use pacman.

I installed the latest EV version at:

In order to use this area, prepend this path to your CMTPATH before running athena:
export CMTPATH=/nfs/$CMTPATH
Future updates can be installed in the same EVgroupArea directory using pacman

  • Using Pacman at PIC
Let say you want to install EventView-$Release at PIC. First configure pacman:
      * cd /nfs/$VERSION
      * source
Then go to the EV groupArea directory and create a new directory for the desired version
      * cd /nfs/
      * mkdir EventView-$RELEASE
      * cd EventView-$RELEASE
and execute the pacman command:
      * pacman -v all -get$RELEASE.pacman

Major updates:
-- UllaBlumenschein - 09 Jan 2007 -- Main.cosuna - 09 Jan 2007

%RESPONSIBLE% Main.unknown

%REVIEW% Never reviewed

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Topic revision: r13 - 2007-01-16 - unknown
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