5- to 16-GeV Single-π+Photoproduction from Hydrogen

The differential cross sections for single-${\pi }^{+}$ photoproduction from hydrogen have been measured over a range of momentum transfers from -2×${10}^{-4\mathrm{}}$ to -2 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$, and photon energies from 5 to 16 GeV. The differential cross section increases by roughly a factor of 2 as the magnitude of the square of the momentum transfer decreases from 0.02 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$. The cross section falls approximately as $\exp \mathrm{}(-3\mathrm{}|t\left|\right)\mathrm{}$ at large momentum transfers, with a similar momentum-transfer dependence of the cross section at all photon energies studied.