Run6 FPD Shower Shape Simulation and Data Comparison Part 2.

Link to Part 1, which explains the categorization of events.

Here we add the results from the full Pythia+GSTAR pilot run to the previous shower shape analysis. The same cuts used in data to identify single photon clusters were used for the full Pythia sample, as defined below. (Therefore these are not explicit single photon clusters.)

"single photon" clusters were chosen by selecting clusters that produced one(and only one) of the two photons that form a pi0 with Egg<50GeV, Mgg=0.135+-0.04, and Dgg>2.

The same three categories, Central, Corner, and Edge, were used for the following plots. The color scheme is the following.

1. Black: Data

2. Red: Previous flat distribution+GSTAR single photon only MC

3. Blue: Full Pythia+GSTAR

4. Green: Full Pythia+GSTAR with only EM energies included.

Fig.1. Central Events Energy Fraction for the Three Highest Towers. (Etower/Ecluster)

Fig.2. Corner Events Energy Fraction for the Three Highest Towers. (Etower/Ecluster)

Fig.3. Edge Events Energy Fraction for the Three Highest Towers. (Etower/Ecluster)

Now we look at the Cluster SigmaMax variable, which plays a dominant role in the categorization of cllusters. Unfortunately, we don't have enough MC statistics to look at it in energy bins. NOTE: The plots have been fixed.

Fig. 4. SIgmaMax for Central Events

Fig. 5. SIgmaMax for Corner Events

Fig. 6. SIgmaMax for Edge Events