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% Strangeness production in low Q2 at HERA 
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% Main editor: C.Grab, grab@phys.ethz.ch
% contributing editors: M.Del Degan, A.Falkiewicz, G.Nowak
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%===============================title page=============================

% Some useful tex commands
%
\newcommand{\GeV}{{\rm\,GeV}}
\newcommand{\gev}{{\rm\,GeV}}
\newcommand{\mev}{{\rm\,MeV}}
\newcommand{\TeV}{{\rm\,TeV}}
\newcommand{\pb}{{\rm\,pb}}
\newcommand{\pbinv}{{\rm\,pb^{-1}}}
\newcommand{\cm}{\rm cm}
\newcommand{\fm}{\rm fm}
\newcommand{\hdick}{\noalign{\hrule height1.4pt}}
\newcommand{\PT}{p_{\perp}}
\newcommand{\pt}{p_{_{\rm T}}}
\newcommand{\ptbrcr}{p_{_{\rm T,Breit}(current)}}
\newcommand{\ptbrtr}{p_{_{\rm T,Breit(target)}}}
\newcommand{\dedxns}{${\rm d}E/{\rm d}x$}
\newcommand{\dedxf}{{\rm d}E/{\rm d}x}
\newcommand{\dedx}{${\rm d}E/{\rm d}x$~}
\newcommand{\thpl}{$\Theta^+$~}
\newcommand{\thplns}{$\Theta^+$}
\newcommand{\thplf}{\Theta^+}
\newcommand{\ksf}{\ensuremath{K^0_s}}
\newcommand{\lsf}{\ensuremath{\Lambda}}
\newcommand{\lsa}{\ensuremath{\bar{\Lambda}}}
%\newcommand{\lambdas}{\ensuremath{\bar{\lambda_s}}}
\newcommand{\lambdas}{\ensuremath{\lambda_s}}
\newcommand{\kzero}{$K^0$~}
\newcommand{\GeVSq}{\rm\,GeV^2}
\newcommand{\qsq}{\ensuremath{Q^2} }
\newcommand{\gevsq}{\ensuremath{\mathrm{GeV}^2} }
\newcommand{\et}{\ensuremath{E_t^*} }
\newcommand{\rap}{\ensuremath{\eta^*} }
\newcommand{\gp}{\ensuremath{\gamma^*}p }

\newcommand{\pqqc}{$\Xi^{--}_{5q}\,$}
\newcommand{\pqqn}{$\Xi^{0}_{5q}\,$}
\newcommand{\ximm}{$X^{--}\,$}
\newcommand{\xipm}{$X^{0}\,$}
\newcommand{\xizero}{$\Xi(1530)^{0}\,$}

% specific strange defs:
\newcommand{\bars}{\ensuremath{\bar{s}}}
\newcommand{\baru}{\ensuremath{\bar{u}}}
\newcommand{\bard}{\ensuremath{\bar{d}}}
\newcommand{\LO}{$O(\alpha_s^0)$}
\newcommand{\Oa}{$O(\alpha_s)$}
\newcommand{\Oaa}{$O(\alpha_s^2)$}




\newcommand{\coll}{Collaboration}
\newcommand{\etal}{{\it et al}}
\newcommand{\ie}{{\it i.e.}}




% Journal macro
\def\Journal#1#2#3#4{{#1} {\bf #2} (#3) #4}
\def\NCA{\em Nuovo Cimento}
\def\NIM{\em Nucl. Instrum. Methods}
\def\NIMA{{\em Nucl. Instrum. Methods} {\bf A}}
\def\NPB{{\em Nucl. Phys.}   {\bf B}}
\def\PLB{{\em Phys. Lett.}   {\bf B}}
\def\PRL{\em Phys. Rev. Lett.}
\def\PRD{{\em Phys. Rev.}    {\bf D}}
\def\ZPC{{\em Z. Phys.}      {\bf C}}
\def\EJC{{\em Eur. Phys. J.} {\bf C}}
\def\CPC{\em Comp. Phys. Commun.}


\begin{document}

%\pagestyle{empty}
\begin{titlepage}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%% For conference papers  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%% coment the header and fill the right conference
%%%%% {\it {\large version of \today}} \\[.3em]
\begin{center} %%% you may want to use this line for working versions
 \begin{small}
 \begin{tabular}{llrr}
 {\bf H1prelim-08-034} Submitted to & & &
 \epsfig{file=/h1/iww/ipublications/H1PublicationTemplates/H1logo_bw_small.epsi
 ,width=1.5cm} \\[.2em] \hline
 \multicolumn{4}{l}{{\bf
                XVI International Workshop on Deep-Inelastic Scattering, DIS2008},
                 April 7-11,~2008,~London} \\
            %      Abstract:        & {\bf }    & & \\
                  Parallel Session & {\bf Hadronic Final State and QCD}   & & \\ \hline
   \multicolumn{4}{l}{\footnotesize {\it Electronic Access:https://www-h1.desy.de/publications/H1preliminary.short\_list.html
     %www-h1.desy.de/h1/www/publications/conf/conf\_list.html
     }} \\[.2em]
 \end{tabular}
 \end{small}
 \end{center} 
\vspace{2cm}
\noindent

\begin{center}
\begin{Large}

{\bf Strangeness Production \\
in Deep-inelastic $ep$ Scattering at HERA }

\vspace{2cm}

H1 Collaboration

\end{Large}
\end{center}

\vspace{2cm}


\begin{abstract}

\noindent
The production of the neutral strange mesons \ksf\
and the strange baryons $\Lambda$ and their antiparticles 
is investigated using deep inelastic 
scattering events measured with the H1 detector at HERA.
%
The \ksf\ and $\Lambda$ production cross sections and
the baryon to meson ratios
are  reported differentially for the range of negative 
photon four-momentum transfer squared
$2 < Q^2 < 100$ $\GeVSq$ and photon inelasticity $0.1 < y < 0.6$.
In addition, the  \ksf\ production rates are compared directly 
with those of charged particles in the same phase space region. 
The $\Lambda - \bar{\Lambda}$ asymmetry is also measured differentially 
and found to be consistent with zero in all bins. 

The model predictions, based on leading order Monte Carlo 
programs in general  are able to describe the overall features of the
measurements, however fail in particular details.
The data agree with the expectations from $e^+ e^-$ colliders.

\end{abstract}

\vspace{1.5cm}

\end{titlepage}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% Figures
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Kshort signal
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newpage
\begin{figure}
\begin{center}
%\includegraphics[width=99mm]{figs/KaonMass_L4.eps}
\includegraphics[width=99mm]{H1prelim-08-034.fig1.eps}
\setlength{\unitlength}{\textwidth}
\caption{The invariant mass spectra for 
$\pi^+\pi^{-}$ particle combinations.
The solid lines show the result of a fit to the data
using two Gaussian functions for the \ksf\ signal  and a background 
function 
%as defined in equation~\ref{eq:massfits} 
while the dashed lines indicate the background function only.
The data are shown as black points with error bars denoting total uncertainty.
%
%The error bars show the statistical (inner bars) and the
%total (outer bars) errors, respectively.
} 
\label{fig:kmass}
\end{center}
\end{figure}

%%% \clearpage
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Lambda signal
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newpage
\begin{figure}
\begin{center}
%\includegraphics[width=79mm]{figs/LambdaOnlyMass_L4.eps}
%\includegraphics[width=79mm]{figs/AntiLambdaOnlyMass_L4.eps}
\includegraphics[width=79mm]{H1prelim-08-034.fig2a.eps}
\includegraphics[width=79mm]{H1prelim-08-034.fig2b.eps}
\setlength{\unitlength}{\textwidth}
%
%\begin{picture}(0,0)
%   \put(-0.07,0.31){\bfseries a)}
%   \put(0.43,0.31){\bfseries b)}
%\end{picture}
%
\caption{The invariant mass spectra for 
a) \lsf\ $\rightarrow p \pi^{-}$ and b) \lsa\ ${\rightarrow \bar p} \pi^{+}$ 
particle combinations.
The solid lines show the result of a fit to the data
using two Gaussian functions for the \lsf\ and
the \lsf\ signal, and the background 
function 
%as defined in equation~\ref{eq:massfits} 
while the dashed lines indicate the background function only.
The data are shown as black points with error bars denoting total uncertainty.
%The spectra are shown for comparisons without the level-4 event weights
%
%The error bars show the statistical (inner bars) and the
%total (outer bars) errors, respectively.
} 
\label{fig:l-mass}
\end{center}
\end{figure}

\clearpage
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% K-short differential cross sections - lab frame:
%%
\newpage
\begin{figure}
\begin{center}
%\includegraphics[width=69mm]{figs/Xsection_K0_MC_PT.eps}
%\includegraphics[width=69mm]{figs/Xsection_K0_MC_ETA.eps}\\
%\includegraphics[width=69mm]{figs/Xsection_K0_MC_Q2.eps}
%\includegraphics[width=69mm]{figs/Xsection_K0_MC_Y.eps}\\
%\includegraphics[width=69mm]{figs/Xsection_K0_MC_X.eps}
\includegraphics[width=69mm]{H1prelim-08-034.fig3a.eps}
\includegraphics[width=69mm]{H1prelim-08-034.fig3b.eps}\\
\includegraphics[width=69mm]{H1prelim-08-034.fig3c.eps}
\includegraphics[width=69mm]{H1prelim-08-034.fig3d.eps}\\
\includegraphics[width=69mm]{H1prelim-08-034.fig3e.eps}
%
%\begin{picture}(0,0)
%   \put(-0.07,0.31){\bfseries a)}
%   \put(0.43,0.31){\bfseries b)}
%\end{picture}
%
\caption{The differential production cross sections for 
\ksf\ in the laboratory frame as a function of
%a) the \ksf\ transverse momentum $\pt(\ksf)$ and
 the \ksf\ transverse momentum $\pt$ and
%b) the \ksf\ pseudorapidity $\eta(\ksf)$ in the laboratory frame;
  the \ksf\ pseudorapidity $\eta$ in the laboratory frame
and of the event variables:
%c) photon virtuality squared \qsq, d) photon inelasticity $y$
 photon virtuality squared \qsq,  photon inelasticity $y$
%and e) Bjorken scaling variable $x$.
and  Bjorken scaling variable $x$.
%The symbols denote the values averaged over the bins and
%are plotted at the bin centres.
%The error bars show the statistical (inner bars) and the
%total (outer bars) errors, respectively.
The error bars show full uncertainty.
The lines show the different LO Monte Carlo predictions
%The shaded bands indicate the uncertainties on the predictions
%(see text).}
.}
\label{fig:ks-ds-lab}
\end{center}
\end{figure}

\clearpage

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% K-short differential cross sections: pt, xp in Breit frame
%%
\newpage
\begin{figure}
\begin{center}
%\includegraphics[width=79mm]{figs/Xsection_K0_MC_PTBT.eps}
%\includegraphics[width=79mm]{figs/Xsection_K0_MC_XPBT.eps}\\
%\includegraphics[width=79mm]{figs/Xsection_K0_MC_PTBC.eps}
%\includegraphics[width=79mm]{figs/Xsection_K0_MC_XPBC.eps}\\
\includegraphics[width=79mm]{H1prelim-08-034.fig4a.eps}
\includegraphics[width=79mm]{H1prelim-08-034.fig4b.eps}\\
\includegraphics[width=79mm]{H1prelim-08-034.fig4c.eps}
\includegraphics[width=79mm]{H1prelim-08-034.fig4d.eps}\\

\caption{The differential \ksf\ production cross sections 
measured in the Breit frame as a function of 
%the \ksf\ transverse momentum $p_T(\ksf)$ and
the \ksf\ transverse momentum $p_T$ and
%the momentum fraction $x_{P,breit}(\ksf)$ both in the current frame
the momentum fraction $x_{P,breit}$ both in the current 
%(a) and b), and in the target frame (c) and d)).}
and in the target frame.}
\label{fig:ks-ds-breit}
\end{center}
\end{figure}

\clearpage

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Lambda differential cross sections -lab frame:
%%
\newpage
\begin{figure}
\begin{center}
%\includegraphics[width=60mm]{figs/Xsection_L0_MC_PT.eps}
%\includegraphics[width=60mm]{figs/Xsection_L0_MC_ETA.eps}\\
%\includegraphics[width=60mm]{figs/Xsection_L0_MC_Q2.eps}
%\includegraphics[width=60mm]{figs/Xsection_L0_MC_Y.eps}\\
%\includegraphics[width=60mm]{figs/Xsection_L0_MC_X.eps}
\includegraphics[width=60mm]{H1prelim-08-034.fig5a.eps}
\includegraphics[width=60mm]{H1prelim-08-034.fig5b.eps}\\
\includegraphics[width=60mm]{H1prelim-08-034.fig5c.eps}
\includegraphics[width=60mm]{H1prelim-08-034.fig5d.eps}\\
\includegraphics[width=60mm]{H1prelim-08-034.fig5e.eps}
\caption{The differential production cross sections for 
\lsf\ in the laboratory frame as a function of
%a) the \lsf\ transverse momentum $\pt(\lsf)$ and
%b) the \lsf\ pseudorapidity $\eta(\lsf)$, 
 the \lsf\ transverse momentum $\pt$ and
 the \lsf\ pseudorapidity $\eta$, 
and of the event variables:
%c) photon virtuality squared \qsq, d) photon inelasticity $y$
 photon virtuality squared \qsq, photon inelasticity $y$
%and  e)Bjorken scaling variable $x$.
and  Bjorken scaling variable $x$.
%The symbols denote the values averaged over the bins and
%are plotted at the bin centres.
The error bars show the statistical (inner bars) and the
total (outer bars) errors, respectively.
%The solid lines show the predictions of the LO Monte Carlo 
%program CDM.
The  lines show the predictions of the LO Monte Carlo 
programs.
%The shaded bands indicate the uncertainties on the predictions
%(see text).}
.}
\label{fig:la-ds-lab}
\end{center}
\end{figure}

\clearpage

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Lambda  differential cross sections: pt, eta  breit frame
%%
\newpage
\begin{figure}
\begin{center}
%\includegraphics[width=79mm]{figs/Xsection_L0_MC_PTBT.eps}
%\includegraphics[width=79mm]{figs/Xsection_L0_MC_XPBT.eps}\\
%\includegraphics[width=79mm]{figs/Xsection_L0_MC_PTBC.eps}
%\includegraphics[width=79mm]{figs/Xsection_L0_MC_XPBC.eps}\\
\includegraphics[width=79mm]{H1prelim-08-034.fig6a.eps}
\includegraphics[width=79mm]{H1prelim-08-034.fig6b.eps}\\
\includegraphics[width=79mm]{H1prelim-08-034.fig6c.eps}
\includegraphics[width=79mm]{H1prelim-08-034.fig6d.eps}\\
\caption{The differential production cross sections for 
the sum of \lsf\ and \lsa\  baryons   
measured in the Breit frame as a function of the \lsf\
transverse momentum $p_T$ and
%the transverse momentum $p_T(\lsf)$ and
the momentum fraction $x_{P,breit}$ both in the current 
%the momentum fraction $x_{P,breit}(\lsf)$ both in the current frame
%(a) and b), and in the target frame (c) and d)).}
 and in the target frame.}
\label{fig:la-ds-breit}
\end{center}
\end{figure}
\clearpage


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Lambda and antilambda assymmetry - lab frame:
%%
%%
\newpage
\begin{figure}
\begin{center}
%\includegraphics[width=69mm]{figs/LambdaAsymmetry_PT.eps}
%\includegraphics[width=69mm]{figs/LambdaAsymmetry_ETA.eps}\\
%\includegraphics[width=69mm]{figs/LambdaAsymmetry_Q2.eps}
%\includegraphics[width=69mm]{figs/LambdaAsymmetry_Y.eps}\\
%\includegraphics[width=69mm]{figs/LambdaAsymmetry_X.eps}
\includegraphics[width=69mm]{H1prelim-08-034.fig7a.eps}
\includegraphics[width=69mm]{H1prelim-08-034.fig7b.eps}\\
\includegraphics[width=69mm]{H1prelim-08-034.fig7c.eps}
\includegraphics[width=69mm]{H1prelim-08-034.fig7d.eps}\\
\includegraphics[width=69mm]{H1prelim-08-034.fig7e.eps}
%
\caption{The differential production cross sections for 
the \lsf\ to \lsa\ baryon asymmetry in the laboratory frame as a function of
%a) the  transverse momentum $\pt(\lsf)$ and
%b) the  pseudorapidity $\eta(\lsf)$, 
 the \lsf\  transverse momentum $\pt$ and
 the  pseudorapidity $\eta$, 
and of the event variables:
%c) photon virtuality squared \qsq, d) photon inelasticity $y$
%and  e)Bjorken scaling variable $x$.
 photon virtuality squared \qsq,  photon inelasticity $y$
and  Bjorken scaling variable $x$.
%The symbols denote the values averaged over the bins and
%are plotted at the bin centres.
The error bars show the statistical uncertainty.
%The error bars show the statistical (inner bars) and the
%total (outer bars) errors, respectively.
The solid lines show the predictions of the LO Monte Carlo 
program CDM
%The shaded bands indicate the uncertainties on the predictions
%(see text).}
.}
\label{fig:la-al-lab}
\end{center}
\end{figure}

\clearpage

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Lambda  asymmetry in breit frame
%%
\newpage
\begin{figure}
\begin{center}
%\includegraphics[width=79mm]{figs/LambdaAsymmetry_PTBT.eps}
%\includegraphics[width=79mm]{figs/LambdaAsymmetry_XPBT.eps}\\
%\includegraphics[width=79mm]{figs/LambdaAsymmetry_PTBC.eps}
%\includegraphics[width=79mm]{figs/LambdaAsymmetry_XPBC.eps}\\
\includegraphics[width=79mm]{H1prelim-08-034.fig8a.eps}
\includegraphics[width=79mm]{H1prelim-08-034.fig8b.eps}\\
\includegraphics[width=79mm]{H1prelim-08-034.fig8c.eps}
\includegraphics[width=79mm]{H1prelim-08-034.fig8d.eps}\\
%
\caption{The differential production cross sections for 
the \lsf\ to \lsa\ baryon asymmetry
measured in the Breit frame as a function of 
%the transverse momentum $p_T(\lsf)$ and
%the momentum fraction $x_{P,breit}(\lsf)$ both in the current frame
%(a) and b), and in the target frame (c) and d)).}
the \lsf\ transverse momentum $p_T$ and
the momentum fraction $x_{P,breit}$ both in the current 
 and in the target frame.}
\label{fig:la-al-breit}
\end{center}
\end{figure}
\clearpage


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% baryon meson ratio in lab frame
%%
%%
%%
\newpage
\begin{figure}
\begin{center}
%\includegraphics[width=60mm]{figs/Xsection_Ratio_MC_PT.eps}
%\includegraphics[width=60mm]{figs/Xsection_Ratio_MC_ETA.eps}\\
%\includegraphics[width=60mm]{figs/Xsection_Ratio_MC_Q2.eps}
%\includegraphics[width=60mm]{figs/Xsection_Ratio_MC_Y.eps}\\
%\includegraphics[width=60mm]{figs/Xsection_Ratio_MC_X.eps}\\
\includegraphics[width=60mm]{H1prelim-08-034.fig9a.eps}
\includegraphics[width=60mm]{H1prelim-08-034.fig9b.eps}\\
\includegraphics[width=60mm]{H1prelim-08-034.fig9c.eps}
\includegraphics[width=60mm]{H1prelim-08-034.fig9d.eps}\\
\includegraphics[width=60mm]{H1prelim-08-034.fig9e.eps}\\
%%%%%\begin{picture}(0,0)
%   \put(-66.5,105){\bfseries a)}
%   \put(13.,105){\bfseries b)}
%\end{picture}
\caption{The differential production cross sections for 
the \lsf\ baryon to \ksf\ meson ratio 
in the laboratory frame as a function of
%a) the  transverse momentum $\pt$ and
%b) the  pseudorapidity $\eta$, 
the  transverse momentum $\pt$ and
 the  pseudorapidity $\eta$, 
and of the event variables:
%c) photon virtuality squared \qsq, d) photon inelasticity $y$
%and  e)Bjorken scaling variable $x$.
 photon virtuality squared \qsq, photon inelasticity $y$
and  Bjorken scaling variable $x$.
%The symbols denote the values averaged over the bins and
%are plotted at the bin centres.
The error bars show the statistical uncertainty.
%The error bars show the statistical (inner bars) and the
%total (outer bars) errors, respectively.
The 
%solid 
lines show the predictions of the LO Monte Carlo 
programs 
%CDM.
%The shaded bands indicate the uncertainties on the predictions
%(see text)
.}
\label{fig:la-ks-ratio-lab}
\end{center}
\end{figure}

\clearpage

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Lambda to Ks ratio: pt, xp  Breit frame
%%
\newpage
\begin{figure}
\begin{center}
%\includegraphics[width=79mm]{figs/Xsection_Ratio_MC_PTBT.eps}
%\includegraphics[width=79mm]{figs/Xsection_Ratio_MC_XPBT.eps}\\
%\includegraphics[width=79mm]{figs/Xsection_Ratio_MC_PTBC.eps}
%\includegraphics[width=79mm]{figs/Xsection_Ratio_MC_XPBC.eps}\\
\includegraphics[width=79mm]{H1prelim-08-034.fig10a.eps}
\includegraphics[width=79mm]{H1prelim-08-034.fig10b.eps}\\
\includegraphics[width=79mm]{H1prelim-08-034.fig10c.eps}
\includegraphics[width=79mm]{H1prelim-08-034.fig10d.eps}\\
%
\caption{The differential production cross sections for 
the \lsf\ baryon to \ksf\ meson ratio 
measured in the Breit frame as a function of 
the transverse momentum $p_T$ and
the momentum fraction $x_{P,breit}$ both in the current
%(a) and b), and in the target frame (c) and d)).}
  and in the target frame.}
\label{fig:la-ks-ratio-breit}
\end{center}
\end{figure}
\clearpage

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Ks to charged ratio in lab frame
%% %%
%%
\newpage
\begin{figure}
\begin{center}
%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_PT.eps}
%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_ETA.eps}\\
%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_Q2.eps}
%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_Y.eps}\\
%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_X.eps}\\
\includegraphics[width=69mm]{H1prelim-08-034.fig11a.eps}
\includegraphics[width=69mm]{H1prelim-08-034.fig11b.eps}\\
\includegraphics[width=69mm]{H1prelim-08-034.fig11c.eps}
\includegraphics[width=69mm]{H1prelim-08-034.fig11d.eps}\\
\includegraphics[width=69mm]{H1prelim-08-034.fig11e.eps}\\
%
\caption{The differential production cross sections for 
the \ksf\ meson to charged hadrons ratio 
in the laboratory frame as a function of
 the  transverse momentum $\pt$ and
 the  pseudorapidity $\eta$, 
%a) the  transverse momentum $\pt$ and
%b) the  pseudorapidity $\eta$, 
and of the event variables:
%c) photon virtuality squared \qsq, d) photon inelasticity $y$
%and  e)Bjorken scaling variable $x$.
 photon virtuality squared \qsq,  photon inelasticity $y$
and  Bjorken scaling variable $x$.
%The symbols denote the values averaged over the bins and
%are plotted at the bin centres.
The error bars show the total uncertainty.
%The error bars show the statistical (inner bars) and the
%total (outer bars) errors, respectively.
The 
%solid
 lines show the predictions of the LO Monte Carlo 
programs. 
%CDM.
%The shaded bands indicate the uncertainties on the predictions
%(see text)
.}
\label{fig:ks-charged-ratio-lab}
\end{center}
\end{figure}

\clearpage

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% Ks to charged ratio: pt, eta  breit frame
%%
%%%\newpage
%%%\begin{figure}
%%%\begin{center}
%%%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_PDF_PT.eps}
%%%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_ETA.eps}\\
%%%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_Q2.eps}
%%%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_Q2.eps} \\
%%%%%
%%%\caption{The differential production cross sections for 
%%%the \ksf\ meson to charged particles ratio 
%%%measured in the Breit frame as a function of 
%%%the transverse momentum $p_T$ and
%%%the momentum fraction $x_{P,breit}$ both in the current frame
%%%(a) and b), and in the target frame (c) and d)).}
%%%\label{fig:ks-charged-ratio-breit}
%%%\end{center}
%%%\end{figure}
\clearpage

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Ks to charged ratio: lab frame: different PDFs
%%
%\newpage
%\begin{figure}
%\begin{center}
%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_PDF_PT.eps}
%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_PDF_ETA.eps}\\
%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_PDF_Q2.eps}
%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_PDF_Y.eps} \\
%\includegraphics[width=69mm]{figs/Xsection_Ratio_h_PDF_X.eps} \\
%\includegraphics[width=69mm]{H1prelim-08-034.fig12a.eps}
%\includegraphics[width=69mm]{H1prelim-08-034.fig12b.eps}\\
%\includegraphics[width=69mm]{H1prelim-08-034.fig12c.eps}
%\includegraphics[width=69mm]{H1prelim-08-034.fig12d.eps} \\
%\includegraphics[width=69mm]{H1prelim-08-034.fig12e.eps} \\
%%%%%
%\caption{The differential production cross sections for 
%the \ksf\ meson to charged hadrons ratio
%in the laboratory frame as a function of
%%a) the $\ksf$ transverse momentum $\pt$ and
%%b) the $\ksf$  pseudorapidity $\eta$,
% the $\ksf$ transverse momentum $\pt$ and
% the $\ksf$  pseudorapidity $\eta$,
%and of the event variables:
%%c) photon virtuality squared \qsq, d) photon elasticity $y$
%%and  e)Bjorken scaling variable $x$.
% photon virtuality squared \qsq,  photon elasticity $y$
%and  Bjorken scaling variable $x$.
%Overlaid are predictions of various proton PDFs: CTEQ5L,CTEQ6L and 
%H12000 LO.}
%\label{fig:ks-charged-ratio-pdf}
%\end{center}
%\end{figure}
%\clearpage

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% lambda and ks : pdf
%%
\newpage
\begin{figure}
\begin{center}
%
%\includegraphics[width=69mm]{figs/Xsection_K0_PDF_Q2.eps}
%\includegraphics[width=69mm]{figs/Xsection_K0_PDF_ETA.eps}\\
%\includegraphics[width=69mm]{figs/Xsection_L0_PDF_Q2.eps}
%\includegraphics[width=69mm]{figs/Xsection_L0_PDF_ETA.eps}\\
\includegraphics[width=69mm]{H1prelim-08-034.fig12a.eps}
\includegraphics[width=69mm]{H1prelim-08-034.fig12b.eps}\\
\includegraphics[width=69mm]{H1prelim-08-034.fig12c.eps}
\includegraphics[width=69mm]{H1prelim-08-034.fig12d.eps}\\
%
\caption{The differential production cross sections for 
\ksf\ and \lsf\ in the laboratory frame as a function of
%a) the event variable \qsq\ and b) the pseudorapidity $\eta$.
 the event variable \qsq\ and  the pseudorapidity $\eta$.
Overlaid are predictions by various proton PDFs: 
%CTEQ6L, GRV-94 (LO), H12000LO.
CTEQ6L, GRV LO, H12000 LO.
}
\label{fig:ks-la-pdf}
\end{center}
\end{figure}

\clearpage



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\end{document}
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