2009.11.11 Tests of EEMC geometry, version 6.1

Monte-Carlo setup:

• Throwing one photon per event
• Compare EEMC geometry v6.0 (pure lead) vs. v6.1
• Full STAR geometry configurations with and without LOW_EM option
• Throw particles flat in eta (1.08, 2.0), phi (0, 2pi), and pt (6-10 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

FYI: tests with v6.1 by Alice

Geometry configurations

1. dashed/open red: full STAR y2006, no LOW_EM, EEMC geometry v6.1
2. solid red: full STAR y2006, with LOW_EM, EEMC geometry v6.1
3. dashed/open black: full STAR y2006, full STAR y2006, no LOW_EM, EEMC geometry v6.0
4. solid black: full STAR y2006, full STAR y2006, with LOW_EM, EEMC geometry v6.0

Sampling fraction of various EEMC layers (tower, SMD, pre1-,pre2-, post- shower)

Figure 1: Sampling fraction of various EEMC layers vs. thrown photon energy:
(a) tower s.f.; (b) tower s.f. distribution; (c) pre-shower1; (d) pre-shower2; (e) SMD, (f) post-shower

Figure 2: (left) Shower shapes and (right) shower shape ratios