2009.11.23 New EEMC geometry (CVS v6.1): y2006 vs. y2009 STAR configurations

Monte-Carlo setup:

• Throwing one photon per event
• Compare new EEMC geometry in CVS for y2006 and 2009 configurations
• Full STAR geometry configurations with and without LOW_EM option
• Throw particles flat in eta (1.08, 2.0), phi (0, 2pi), and energy (5-35 GeV)
• Using A2Emaker to get reconstructed Tower/SMD energy (no EEMC SlowSimulator in chain)
• Vertex z=0
• ~50K/per particle type
• Non-zero energy: 3 sigma above pedestal

Geometry configurations

1. red: full STAR y2009, with/without LOW_EM, EEMC geometry
2. black: full STAR y2006, with/without LOW_EM, EEMC geometry v6.1

Figure 1: EEMC sampling fraction (left) distribution (right) vs. thrown photon energy (1.2 < eta < 1.9; no pt cuts)

Figure 2: EEMC sampling fraction (left) distribution (right) vs. thrown photon energy (1.2 < eta < 1.9; pt > 7GeV cut)

Figure 3: 2x1/3x3 clustering

Figure 4: Shower shapes

Figure 5: Shower shape ratios (v plane)

Figure 6: Shower shape ratios (u plane)

Figure 7: Pre-shower migration (1.2 < eta < 1.9; no pt cuts)