Ilya Selyuzhenkov February 16, 2009

Data sets

• pp2006 - STAR 2006 pp longitudinal data (~ 3.164 pb^1)
  Trigger: eemc-http-mb-L2gamma [id:137641]
• mc2006: gamma-jet+QCD jets [p6410EemcGammaFilter] events.

Partonic pt range 2-25 GeV.

• pp2008 - STAR 2008 pp data
  Trigger: etot-mb-l2 [id:7]

Cuts applied

• Di-jet events
• Require to reconstruct photon momentum (no gamma-jet isolation cuts)
• Gamma pt > 7GeV, jet pt > 7GeV
• L2gamma emulation in Monte-Carlo
• L2gamma triggered for pp2006 and pp2008 events
• cos (phi_jet - phi_gamma) < -0.8
• detector |eta_jet|< 0.8
• |v_z| < 100

Figures

Each figure has:

• pp2008 data scaled to match the integraled yield from pp2006 data
• mc2006 stand for MC sum: QCD + gamma-jet
  Monte-Carlo results for QCD and gamma-jet samples are first
  scaled to 3.164 pb^-1 according to Pythia luminosity,
  added together, and then an additional fudge factor of 1.24 applied.
  Fudge factor is defined as pp2006 to Monte-Carlo sum ratio
  for pt_jet>7GeV and pt_gamma>7 candidates

plots for pt_gamma>7GeV, pt_jet > 5GeV

1. All pre-shower combined: 1D distributions
2. All pre-shower combined: 2D correlations
3. Pre-shower sorting 1D distributions