Analysis Tools Tutorial: Introduction

1
Analysis Tools Tutorial Introduction

• Ketevi A. Assamagan
• CERN, September 20th, 2004

2
Objective

• Demonstrate how to use the Analysis EDM Tools
• How to produce ESD
• How to produce AOD
• How to develop your analysis codes in ATHENA on
  AOD
• Available tools and how to use them
• Where to find documentation
• Whom to contact for help
• Get feedback from the users

3
Analysis EDM

• The EDM classes are
• The basis of the AOD
• User analysis data classes
• You may extend these classes as necessary for you
  analysis

4
Accessing the Raw Data

• You have to talk to StoreGate
• const ElectronContainer elecTES0
• scm_storeGate-gtretrieve(elecTES,
  m_electronContainerName)
• if( sc.isFailure() !elecTES )
• mLog ltlt MSGWARNING ltlt "No AOD electron
  container found in TDS" ltlt endreq
• return StatusCodeSUCCESS
• mLog ltlt MSGDEBUG ltlt "ElectronContainer
  successfully retrieved" ltlt endreq
• m_electronContainerName the string key when the
  AOD electron container was created by the AOD
  electron builder. You need to know this key

5
Accessing the Raw Data

• AOD container (or objet) keys
• stdstring name
• Fast Simulation Full, Read Data,
• AtlfastElectonCollection ElectronCollection
• AtlfastMuonCollection MuonCollection
• AtlfastPhotonCollection PhotonCollection
• AtlfastParticleJetContainer ParticleJetCollecti
  on
• AtlfastTauJetContainer TauJetCollection
• AtlfastBJetContainer BCandidates
• AtlfastMissingEt MissingEtObj
• SpclMC SpclMC ? The Truth

6
Analysis Skeleton

• CVS package UserAnalysis
• It is a skeleton ATHENA algorithm
• Sets up the requirements file
• Some default job options files
• The structure of the ATHENA algorithm
• The objective to allow the user to start
  developing analysis code without the overhead of
  the preliminary necessary setup

7
The Analysis Examples

• Look in the CVS package AnalysisExamples
• Current available examples
• How to do pre-selections and record containers of
  pre-selected objects in StoreGate,
  PIDinAOD_jobOptions.py
• Z?ll (le,mu,tau) reconstruction retrieve, from
  StoreGate, the pre-selected containers of
  Electron, Muon, TauJet, in addition to the
  Missing Et objects, and reconstruct Zs as
  CompositeParticle, ZllExample_jobOptions.py
• H?4l (4e,4mu,2e2mu) reconstruction retrieve,
  from StoreGate, the pre-selected containers of
  Electron, Muon, and reconstruct the Higgs as
  CompositeParticle of ZZ and the Zs as
  CompositeParticle of ee or mumu,
  H4lExample_jobOptions.py
• ttbar ? jjb lnub reconstruction retrieve, from
  StoreGate, the containers of pre-selected
  Electron, Muon, BJet, ParticleJet, and MissingEt.
  Find the Neutrino pz from W mass constraint
  return the container of Neutrino, reconstruction
  W? lnu and W?jj as CompositeParticle,
  reconstruction t?Wb and tbar?Wb as
  CompositeParticle, ttbarExample_jobOptions.py
• Demonstrate how to use AIDA histograms and
  CBNT-like ntuples in your analysis
• Very modular analysis code

8
Available AOD Data in 8.7.0

• There some AOD data (DC2) available in
  /afs/cern.ch/user/k/ketevi/w0/aod
• Z ?ee
• Z?mm
• Z?tt
• H?4l (2e2m, 4e, 4m)
• gg ? ttbar
• The single PoolFileCatalog.xml for all the above
  is in the same directory mentioned above

9
Z?ee, Z?mm on AOD
10
ttbar ? jjb lnub
11
ttbar ? jjb lnub
12
ttbar ? jjb lnub
13
Muon Analysis in AOD

• H ? 4m and H ? 2e2m from DC2, 130 GeV

H?4m
H?4e
H?2e2m