Measurements of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>η</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>Photoproduction at Incident Gamma-Ray Energies of 6.0-17.8 GeV

We report on cross-sectional measurements on the photoproduction of ${\ensuremath{\pi}}^{0}$ and ${\ensuremath{\eta}}^{0}$ mesons on hydrogen for a range in $t$ of -0.2 to -0.9 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$ and for a range of energies 6.0-16.0 GeV. The sharp dip observed at lower energies at $t=\ensuremath{-}0.5$ for ${\ensuremath{\pi}}^{0}$ production becomes less pronounced at higher energies. This implies in the Regge framework the ${B}^{0}$ meson trajectory dominates at higher energies. Our one angular distribution for ${\ensuremath{\eta}}^{0}$ production at 6.0 GeV shows no dip at $t=\ensuremath{-}0.5$ as do the ${\ensuremath{\pi}}^{0}$ data.

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