# 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

**red**: full STAR y2009, with/without LOW_EM, EEMC geometry**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 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)

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