Measurements of $π^{0}$ and $η^{0}$ Photoproduction at Incident Gamma-Ray Energies of 6.0-17.8 GeV

We report on cross-sectional measurements on the photoproduction of

π^{0}

and

η^{0}

mesons on hydrogen for a range in

t

of -0.2 to -0.9

{(G e V / c)}^{2}

and for a range of energies 6.0-16.0 GeV. The sharp dip observed at lower energies at

t = - 0.5

for

π^{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

η^{0}

production at 6.0 GeV shows no dip at

t = - 0.5

as do the

π^{0}

data.

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Measurements ofπ0andη0Photoproduction at Incident Gamma-Ray Energies of 6.0-17.8 GeV