Comments:

• See no difference in yilds for different tunes for prompt photons.
• ~ 20% shape differenbce for QCD background Monte-Carlo

Figure 1: Reconstructed gamma-jet candidate yield vs. photon candidate pt in the endcap
(di-jet events found with the jet finder) Prompt photon filtered Monte-Carlo, partonic pt 3-25 GeV
(a)

(b) Same as (a) on a log scale

Figure 2: Same as Fig. 1 for QCD two processes filtered Monte-Carlo, partonic pt 6-9 GeV
(a)

Same on a log scale
(b) Same as (a) on a log scale

Figure 3: QCD ratio Tune-A/Perugia