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%                         P H O T O N 9 9
%                          Freiburg
%                       May  23 - 27, 1999
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Abstract \#000, \today
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{\large \bf
\boldmath Measurement of elastic $\omega$ photoproduction at HERA
\\ }
\vspace{5mm}
M.~Erdmann$^1$
(for the H1 Collaboration)
\\
\vspace{5mm}
{\small\it
(1) University Karlsruhe / DESY, Notkestr. 85, D-22607 Hamburg, Germany
\\
}
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The reaction $\gamma p \rightarrow \omega p$ ($\omega \rightarrow
\pi^0 \gamma$ and $\pi^0 \rightarrow \gamma \gamma$) is studied 
at photon-proton centre-of-mass energies around
$200 {\rm\ GeV}$ using the H1 detector at HERA.
Measurements are presented of the 
photon-proton cross section for elastic $\omega$ production
and of the differential cross section ${\rm d}\sigma/{\rm d}|t|$.
The $t$-dependence is found to follow an exponential distribution
of the form ${\rm d}\sigma/{\rm d}|t| \propto \exp{-b|t|}$. 
The slope parameter $b$ is determined and is compared with the
measurements of other elastic meson production processes.

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