Scaling of single photon production in pp and ppβ collisions is
studied. It is empirically observed the available data scales βΌsβ/pT5β for xTβ=2pTβ/sββ€0.1 and βΌ(sβ)3.3/pT9β for larger xTβ. The NLO pQCD predictions for pp
collisions at sβ of 200 and 5500 GeV, relevant for RHIC and LHC
energies are seen to closely follow this scaling behaviour. Implications for
single photon production in heavy ion collisions are discussed.Comment: 4 pages including 5 figures. Figure 5 changed to include correct
two-loop contributions. (Submitted to Eur. Phys. J. C.