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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
Diffractive dijet electroproduction 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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An analysis of deep inelastic scattering interactions of the type
$ep\rightarrow eXY$ in the kinematic range $Q^2=4\ldots120 \ \mathrm{GeV}^2$
and $y=0.1\ldots 0.7$ is presented, where the component $X$ of the hadronic
final state is well separated in rapidity from a leading baryonic system with
mass $M_Y<1.6 \ \mathrm{GeV}$. The squared four-momentum-transfer at the
proton vertex satisfies $|t|<1 \ \mathrm{GeV}^2$ and the longitudinal momentum
fraction $x_X$ of the system $X$ is required to be $x_X<0.05$. Interactions
are considered where the system $X$ contains two hard jets with transverse
momenta $P_t>4 \ \mathrm{GeV}$ with respect to the photon-proton-axis. Data
taken in 1996 with the H1 detector at HERA corresponding to an integrated
luminosity of $5.2 \ \mathrm{pb^{-1}}$ are analysed. Differential cross
sections are measured and compared to models based either on a factorisable
pomeron exchange with a gluon dominated structure which evolves according to
the DGLAP formalism or on QCD calculations for exclusive $q\overline{q}$ and
$q\overline{q}g$ jet production by the exchange of two hard gluons.

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