In DØ we have measured a probability (cross section) of the photon production over a wide range of
the photon transverse momentum pT, 23 < pT < 300 GeV,
that significantly extends previous analogous
measurements (Figure 2).
One can see from Figure 2 that in the presented pT interval the photon cross section
falls by more than five orders of magnitude.
The uncertainties of our measurement are comparable with existing theoretical ones. We concluded that
the found photon cross section agree with the theoretical predictions in the whole pT interval.