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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
 Inclusive photoproduction of neutral pions  
in the photon hemisphere 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 inclusive photoproduction of $\pi^0$'s  is studied at a mean
$\gamma p$ centre-of-mass energy, $\langle W\rangle= 200$\,GeV.
 The mesons are detected in the backward calorimeter (SpaCal) of the H1
detector at HERA via their decays to photons.
 The double differential $\pi^0$ cross section, measured
 as a function of the pion's transverse
 momentum and rapidity is presented and  compared with
next-to-leading order pQCD calculations and predictions
 of different QCD Monte Carlo models.
The invariant transverse momentum spectrum exhibits a  power-law
tail for $p_T>1.6$ GeV/c, suggesting the onset of hard
parton-parton scattering processes.

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