Direct photon cross sections in proton-proton and antiproton-proton interactions at =24.3 GeV

We report results on inclusive direct photon (γ),π0, and η production in both pp and p̄p interactions at s=24.3 GeV in the transverse momentum range 4.1≤pT≤7.7 GeV/c and rapidity range −0.1≤y≤0.9. The data were collected between 1988 and 1990 by the UA6 experiment at CERN, which employed an internal H2 gas jet target in the Sp̄pS collider. The inclusive direct photon cross sections and the cross section difference σ(pp)−σ(pp) expressed as functions of pT(γ) are compared with next-to-leading order QCD predictions.