%
% Simple template for an abstract of a contributed paper, 
% PANIC99, Uppsala, Sweden, June 10-16, 1999
%
\documentstyle[epsfig,graphicx,12pt]{article}
%
\setlength{\textwidth}{160mm}\setlength{\textheight}{240mm}
\setlength{\oddsidemargin}{0mm}\setlength{\evensidemargin}{0mm}
\setlength{\topmargin}{0mm}
\setlength{\parindent}{0mm} 
\pagestyle{empty}       %no page number!
%
\begin{document}
%
{\large\bf Charmonium Production in Deep Inelastic Scattering at HERA
}\\     [4mm]
%
{H1 Collaboration}\\                            
%
{\small \em DESY, Hamburg, Germany}\\[6mm]
%
The electroproduction of $J/\psi$ and $\psi(2S)$ mesons is studied in elastic, quasi-elastic
and inclusive reactions for four momentum transfers $2<Q^2<80\mbox{~GeV}^2$
and photon-proton centre of mass energies $25 < W < 180\mbox{~GeV}$. The data
were taken with the H1 detector at the electron proton collider HERA in the years 1995 to 1997. 
The total virtual photon-proton cross section for elastic $J/\psi$ production
is measured as a function of $Q^2$ and $W$. The dependence of the
production rates on the square of the momentum transfer from the proton ($t$) 
is extracted. Decay angular distributions are analysed and the ratio of 
the longitudinal and transverse cross sections is derived.
The ratio of the cross sections for quasi-elastic $\psi(2S)$
and $J/\psi$ meson production is measured as a function of $Q^2$. 
The results are
discussed in terms of theoretical models based upon perturbative QCD. 
Differential cross sections for inclusive and inelastic production of 
$J/\psi$ mesons are determined and predictions within two theoretical
frameworks are compared with the data, the
non-relativistic QCD factorization approach including colour octet and
colour singlet contributions, and the model of Soft Colour Interactions.

\vspace*{0.5cm}
{\bf References }\\
1. H1 Collaboration, C.~Adloff {\it et al}, 
DESY-99-026, submitted to Eur. Phys. J. C

\end{document}

