Ilya Selyuzhenkov August 19, 2008

Data sets:

• pp2006 - STAR 2006 ppProductionLong data (~ 3.164 pb^1)
  "eemc-http-mb-l2gamma" trigger after applying gamma-jet isolation cuts.
• pp2008 - STAR ppProduction2008 (~ 5.9M events)
  "fmsslow" trigger after applying gamma-jet isolation cuts.
  [Only ~13 candidates has been selected before pt-cuts]
• gamma-jet - data-driven Pythia gamma-jet sample (~170K events). Partonic pt range 5-35 GeV.
• QCD jets - data-driven Pythia QCD jets sample (~4M events). Partonic pt range 3-65 GeV.

Note: Due to lack of statistics for 2008 data, no pt cuts applied on gamma-jet candidates for both 2006 and 2008 date.

Figure 1: Shower shapes for u-plane [pp2006 data: eemc-http-mb-l2gamma trigger]

Figure 2: Shower shapes for v-plane [pp2006 data: eemc-http-mb-l2gamma trigger]

Figure 3: Shower shapes for u-plane [pp2008 data: fmsslow trigger]

Figure 4: Shower shapes for v-plane [pp2008 data: fmsslow trigger]