# 2009.08.25 Test of corrected EEMC geometry: shower shapes

### Test of corrected EEMC geometry (bug 1618)

Monte-Carlo setup is desribed here

- One particle per event (photons, electrons, and pions)
- Full STAR 2006 geometry.

In Kumac file: detp geom y2006g; gexec $STAR_LIB/geometry.so - Flat in eta (1.08-2.0), phi (0,2pi), and pt (3-30 GeV)
- Using A2Emaker to get reconstructed Tower/SMD energy (no EEMC SlowSimulator in chain)

what assumes fixed sampling fraction of 0.05 (5%) - Vertex z=0
- ~50K/per particle type
- Non-zero energy: 3 sigma above pedestal

**Figure 1:**Single photon shower shape before (red) and after (black) EEMC cAir bug fixed

pt=7-8GeV, eta=1.2-1.4 (left), eta=1.6-1.8 (right)

**Figure 2:** Single photon shower shape vs. data

Monte-Carlo: pt=7-10GeV, eta=1.6-1.8

data: no pre-shower1,2; pt_photon>7, pt_jet>5. no eta cuts.

(see Fig. 1 from here for other pre-shower conditions)

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