Midrapidity direct-photon production inp+pcollisions ats=200GeV

A measurement of direct photons in $p+p$ collisions at $\sqrt{s}=200\mathrm{GeV}$ is presented. A photon excess above background from ${\pi }^0\to \gamma +\gamma$, $\eta \to \gamma +\gamma$ and other decays is observed in the transverse momentum range $5.5<p_{\mathrm{T}}<7\mathrm{GeV}/c$. The result is compared to a next-to-leading-order perturbative QCD calculation. Within errors, good agreement is found between the QCD calculation and the measured result.