Ilya Selyuzhenkov September 23, 2008

Data sets:

• pp2006 - STAR 2006 pp longitudinal data (~ 3.164 pb^1)
  after applying gamma-jet isolation cuts (note: R_cluster > 0.9 is used below).
• 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.

Notations used in the plots:

• Fit peak energy:
  F_peak - integral within +-2 strips from maximum strip
  Maximum strip determined by fitting procedure.
  Float value converted ("cutted") to integer value.
• Data peak energy:
  D_peak - energy sum within +-2 strips from maximum strip (the same strip Id as for F_peak).
• Data tails:
  D_tail^left and D_tail^right.
  Energy sum from 3rd strip up to 30 strips on the
  left and right sides from maximum strip (excludes strips which contributes to D_peak)
• Fit tails:
  F_tail^left and F_tail^right.
  Same definition as for D_tail, but integrals are calculated from a fit function.
• Maximum sided residual:
  max(D_tail-F_tail)
  Maximum of the data minus fit energy on the left and right sides from the peak.

Figure 1: D_peak from [U+V]/2.

Figure 2: (D_peak - F_peak)/D_peak asymmetry

Figure 3: Maximum sided residual from V vs. U plane.

Figure 4: (D_tail-F_tail)^right. (D_tail-F_tail)^left