simulation studies of au+au at 200 gev
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29th Dec. 2005 PMD collaboration meeting VECC Sunil Dogra
Simulation Studies of Au+Au At 200 GeV
Outline:1. Simulation Chain2. Hit level PMD Characteristic3. Clustering output4. MIP In Simulation5. MIP Optimization6. PMD Acceptance factors7. Centrality Selection8. Photon Counting Efficiency and Purity9. DATA
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
Simulation Chain1. Generated 20k minbias 0-20fm events at
200 GeV using HIJING event generator with default settings and π0 decay on.
2. Pass these particles through the GEANT(STARSIM) with all detectors Y2004 geometry which gives output in zebra format.
3. Run bfC(Big Full Chain) with Dr. Phatak’s Clustering routine to get the .event.root, geant.root as out put.
4. Read the PMD and other global information.
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
Hit Level PMD Charactersitics from Simulation
Incident Photons1. Main source π0
2. Other sources are ω, K0, η
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
contd.
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
MIP in Simulation
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
Clustering Output from simulation
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
PMD Acceptance & factors
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
Acceptance factor
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
Reference Multiplicity and N-participants distribution
Number of Participants
1
1
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
Percentage of Clusters
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
MIP Optimization
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
Efficiency for Photon countingEfficiency is defined as number of clusters detected overcertain threshold out of incident number of photons
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
Purity of Photon samplePurity of photon sample is defined as the number of clusters detected over certain threshold out of total number of clusters -like
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
Cluster edep in each η bin
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
Cluster edep in each η bin
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
Mean=.5411RMS = .1166Χ2/ndf = 962/19.4Constant = 5289Mean = .5375+-.0004Sigma = .08414+-.0040
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
Results from Data
nhits<3300 & mean +- sigma
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
cont.
29th Dec 2005 PMD Collaboration Meeting VECCSunil dogra
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