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\begin{document}  
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\begin{titlepage}

\noindent
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%{\tt DESY YY-NNN    \hfill    ISSN 0418-9833} \\
%{\tt Month YYYY}                  \\
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\noindent
%Date:          [today  instruction is preferred] \\ %\today      \\
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\noindent
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%%%%% {\it {\large version of \today}} \\[.3em]
\begin{center} %%% you may want to use this line for working versions
 \begin{small}
 \begin{tabular}{llrr}
 {\bf H1 prelim-10-013} Submitted to & & &
 \epsfig{file=H1logo_bw_small.epsi,width=1.5cm} \\[.2em] \hline
 \multicolumn{4}{l}{{\bf
                  XVIII International Workshop on Deep Inelastic Scattering, 
		  DIS2010},
                  April 19-23,~2010,~Florence} \\
%                  Abstract:        & {\bf xx-xxx}    & & \\
                  Parallel Session & {\bf Small-x, diffraction and VM in DIS and hadron colliders}   & & \\ \hline
   \multicolumn{4}{l}{\footnotesize {\it Electronic Access:
  www-h1.desy.de/publications/H1preliminary.short\_list.html}} \\[.2em]
 \end{tabular}
 \end{small}
 \end{center}


\vspace{2cm}
\begin{center}
\begin{Large}

{\bf Diffractive Jet Production in Deep-Inelastic Scattering with a Leading proton at HERA-2}

\vspace{2cm}

H1 Collaboration

\end{Large}
\end{center}

\vspace{2cm}

\begin{abstract}
The cross section for inclusive jet production in diffractive deep-inelastic 
scattering is presented. The leading final state proton is detected in the 
H1 Forward Proton Spectrometer. The data have been collected during the 
HERA-2 period and correspond to an integrated luminosity 
of  156.7 ${\rm pb}^{-1}$. The data cover the range $x_{IP} <0.1$ in 
fractional proton longitudinal momentum  loss, $|t| \leq 1.0~{\rm GeV}^2$ 
in squared four-momentum transfer at the proton vertex and 
$4 \leq Q^2 \leq 110~{\rm GeV}^2$ in photon virtuality. The dijet topology 
is defined by two inclusive jets in the central region, found by the $k_T$ 
cluster algorithm in the hadronic centre-of-mass system. The presented 
cross sections are corrected to the level of stable hadrons and compared 
to the Monte Carlo generator level predicitons and NLO predictions with 
applied hadronization corections. The NLO predictions describe the data 
in general well, while the Monte Carlo prediction shows a discrepancy in the 
overall normalisation.
\end{abstract}

\vspace{1.5cm}

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%To be submitted to \EJC \;\; or \PLB
%\end{center}

\end{titlepage}

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\newpage

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\begin{figure}%[ht]
\center
\epsfig{file=H1prelim-10-013.fig1.eps ,width=\textwidth}
\setlength{\unitlength}{1cm}
\caption{Differential cross section as a function of $log(x_{IP})$ for the new
data with tagged proton (`FPS`) to the result of the previous H1 analysis of
diffractive dijets in large rapidity gap data. 
The published data are scaled down by the factor of 1.23 to account for the 
proton dissociation background not present in the proton tagged data. A 
good consistency between two independent experimental techniques is shown 
and also the phase space extension in $x_{IP}$ by a factor of 3 can be seen.}

\label{fig:fig1} 
\end{figure}

\begin{figure}%[ht]
\center
\epsfig{file=H1prelim-10-013.fig2.eps ,width=\textwidth}
\setlength{\unitlength}{1cm}
\caption{Differential cross section as a function of the transverse energy of 
the hardest jet in hadronic centre-of-mass system. The data are presented 
with the statistical error in the inner error bar and with the combined 
statistical and uncorrelated systematical error in the outer bar. The 
normalization uncertainty is approximately `5\%` and it is not displayed. 
The comparison to Monte Carlo RapGap generator generator level cross section 
is presented as a red line. The NLO H1 2006 DPDF Fit B prediction corrected 
to the level of stable hadrons is presented in the green bar, the combined 
scale uncertainty and hadronization uncertainty is shown. The NLO prediction 
is in a good agreement with the data within the total error.}
\label{fig:fig1} 
\end{figure}


\begin{figure}%[ht]
\center
\epsfig{file=H1prelim-10-013.fig3.eps ,width=\textwidth}
\setlength{\unitlength}{1cm}
\caption{Differential cross section as a function of the transverse energy 
of the second hardest jet in hadronic centre-of-mass system. The data are 
presented with the statistical error in the inner error bar and with the 
combined statistical and uncorrelated systematical error in the outer bar. 
The normalization uncertainty is approximately `5\%` and it is not displayed. 
The comparison to Monte Carlo RapGap generator generator level cross section 
is presented as a red line. The NLO H1 2006 DPDF Fit B prediction corrected 
to the level of stable hadrons is presented in the green bar, the combined 
scale uncertainty and hadronization uncertainty is shown. The NLO prediction 
agrees with the data within the total error.}
\label{fig:fig1} 
\end{figure}


\begin{figure}%[ht]
\center
\epsfig{file=H1prelim-10-013.fig4.eps ,width=\textwidth}
\setlength{\unitlength}{1cm}
\caption{Differential cross section as a function of $z_{IP}$. The data are 
presented with the statistical error in the inner error bar and with the 
combined statistical and uncorrelated systematical error in the outer bar. 
The normalization uncertainty is approximately `5\%` and it is not displayed. 
The comparison to Monte Carlo RapGap generator generator level cross section 
is presented as a red line. The NLO H1 2006 DPDF Fit B prediction corrected 
to the level of stable hadrons is presented in the green bar, the combined 
scale uncertainty and hadronization uncertainty is shown. The NLO prediction 
agrees with the data within the total error. In the highest bin effects 
of the direct pomeron remnant are expected. The discrepancy between the NLO 
prediction and the data might be related to missing pomeron remnant in the 
NLO prediction. }
\label{fig:fig1} 
\end{figure}


\begin{figure}%[ht]
\center
\epsfig{file=H1prelim-10-013.fig5.eps ,width=\textwidth}
\setlength{\unitlength}{1cm}
\caption{Ddifferential cross section as a function of $y$. The data are 
presented with the statistical error in the inner error bar and with the 
combined statistical and uncorrelated systematical error in the outer bar. 
The normalization uncertainty is approximately `5\%` and it is not 
displayed. The comparison to Monte Carlo RapGap generator generator level 
cross section is presented as a red line. The NLO H1 2006 DPDF Fit B 
prediction corrected to the level of stable hadrons is presented in the 
green bar, the combined scale uncertainty and hadronization uncertainty 
is shown. The NLO prediction agrees with the data within the total error. 
The discrepancy observed in the first bin might be related to the missing 
pomeron remnant in the NLO calculation. }
\label{fig:fig1} 
\end{figure}



\begin{figure}%[ht]
\center
\epsfig{file=H1prelim-10-013.fig6.eps ,width=\textwidth}
\setlength{\unitlength}{1cm}
\caption{Differential cross section as a function of $log(x_{IP})$. The data 
are presented with the statistical error in the inner error bar and with 
the combined statistical and uncorrelated systematical error in the outer bar. 
The normalization uncertainty is approximately `5\%` and it is not displayed. 
The comparison to Monte Carlo RapGap generator generator level cross section 
is presented as a red line. The NLO H1 2006 DPDF Fit B prediction corrected 
to the level of stable hadrons is presented in the green bar, the combined 
scale uncertainty and hadronization uncertainty is shown. The NLO prediction 
agrees with the data and the assumed Regge factorization is confirmed within 
the total error.}
\label{fig:fig1} 
\end{figure}


\begin{figure}%[ht]
\center
\epsfig{file=H1prelim-10-013.fig7.eps ,width=\textwidth}
\setlength{\unitlength}{1cm}
\caption{Differential cross section as a function of the absolute value 
of the difference 
of $\eta$ of the two jets in the hadronic centre-of-mass system. The data are 
presented with the statistical error in the inner error bar and with the 
combined statistical and uncorrelated systematical error in the outer bar. 
The normalization uncertainty is approximately `5\%` and it is not displayed. 
The comparison to Monte Carlo RapGap generator generator level cross section 
is presented as a red line. The NLO H1 2006 DPDF Fit B prediction corrected 
to the level of stable hadrons is presented in the green bar, the combined 
scale uncertainty and hadronization uncertainty is shown. The NLO prediction 
agrees with the data within the total error. The topology in the very last 
bin referrs to the configuration of two jets with very large rapidity gap. 
The discrepancy beyond the total error may hint to a different parton dynamics 
than the DGLAP evolution equations provide.}
\label{fig:fig1} 
\end{figure}



\end{document}




