Table 1.

Photon isolation efficiencies (${\mathit{ϵ}}_{\mathit{\gamma }}$) and rates of jets misidentified as photons ($f_{\text{jet}}$) from collision data for the three kinematic regions, used for the jet background estimate. The isolation criterion is $E_{\text{T}}^{\text{iso}}<$ 4 GeV. The three regions were chosen to maintain a large number of events in each bin. The first uncertainty is statistical while the second is systematic

Kinematic region	Fraction satisfying isolation criterion
	Photons (${\mathit{ϵ}}_{\mathit{\gamma }}$)	Jets misidentified as photons ($f_{\text{jet}}$)
1. 15 GeV $<p_{\text{T}}<$ 40 GeV, $|\mathit{\eta }|<$ 1.37	0.939 ± 0.007 ± 0.009	0.424 ± 0.001 ± 0.013
2. $p_{\text{T}}>$ 40 GeV, $|\mathit{\eta }|<$ 1.37	0.906 ± 0.006 ± 0.013	0.256 ± 0.002 ± 0.010
3. 1.52 $<|\mathit{\eta }|<$ 2.37	0.933 ± 0.007 ± 0.009	0.431 ± 0.002 ± 0.013