%================================================================
% LaTeX file with preferred layout for the contributed papers to
% the ICHEP Conference 98 in Vancouver
% process with:  latex hep98.tex
%                dvips -D600 hep98
%================================================================
\documentstyle[12pt,epsfig]{article}
%\usepackage{epsfig}
%\usepackage{amsmath}
%\usepackage{hhline}
%\usepackage{amssymb}
%\usepackage{times}

\renewcommand{\topfraction}{1.0}
\renewcommand{\bottomfraction}{1.0}
\renewcommand{\textfraction}{0.0}
\newlength{\dinwidth}
\newlength{\dinmargin}
\setlength{\dinwidth}{21.0cm}
\textheight23.5cm \textwidth16.0cm
\setlength{\dinmargin}{\dinwidth}
\setlength{\unitlength}{1mm}
\addtolength{\dinmargin}{-\textwidth}
\setlength{\dinmargin}{0.5\dinmargin}
\oddsidemargin -1.0in
\addtolength{\oddsidemargin}{\dinmargin}
\setlength{\evensidemargin}{\oddsidemargin}
\setlength{\marginparwidth}{0.9\dinmargin}
\marginparsep 8pt \marginparpush 5pt
\topmargin -42pt
\headheight 12pt
\headsep 30pt \footskip 24pt
\parskip 3mm plus 2mm minus 2mm

%===============================title page=============================

% Some useful tex commands
%
\newcommand{\GeV}{\rm GeV}
\newcommand{\TeV}{\rm TeV}
%\newcommand{\pb}{\rm pb}
\newcommand{\cm}{\rm cm}
\newcommand{\hdick}{\noalign{\hrule height1.4pt}}
 

\newcommand{\etm}{$E_t$\hspace{-.5cm}~/~~}
\newcommand{\nnga}{$\nu^* \rightarrow \nu \gamma$ }
\newcommand{\newqq}{$\nu^* \rightarrow e W_{\hookrightarrow q \bar{q}} $ }
\newcommand{\pom}{{I\!\!P}}
\newcommand{\reg}{{I\!\!R}}
\newcommand{\slowpi}{\pi_{\mathit{slow}}}
%\newcommand{\gevsq}{\mathrm{GeV}^2}
\newcommand{\fiidiii}{F_2^{D(3)}}
\newcommand{\fiidiiiarg}{\fiidiii\,(\beta,\,Q^2,\,x)}
\newcommand{\n}{1.19\pm 0.06 (stat.) \pm0.07 (syst.)}
\newcommand{\nz}{1.30\pm 0.08 (stat.)^{+0.08}_{-0.14} (syst.)}
\newcommand{\fiidiiiful}{F_2^{D(4)}\,(\beta,\,Q^2,\,x,\,t)}
\newcommand{\fiipom}{\tilde F_2^D}
\newcommand{\ALPHA}{1.10\pm0.03 (stat.) \pm0.04 (syst.)}
\newcommand{\ALPHAZ}{1.15\pm0.04 (stat.)^{+0.04}_{-0.07} (syst.)}
\newcommand{\fiipomarg}{\fiipom\,(\beta,\,Q^2)}
\newcommand{\pomflux}{f_{\pom / p}}
\newcommand{\nxpom}{1.19\pm 0.06 (stat.) \pm0.07 (syst.)}

\newcommand {\gapprox}
   {\raisebox{-0.7ex}{$\stackrel {\textstyle>}{\sim}$}}
\newcommand {\lapprox}
   {\raisebox{-0.7ex}{$\stackrel {\textstyle<}{\sim}$}}
\def\gsim{\,\lower.25ex\hbox{$\scriptstyle\sim$}\kern-1.30ex%
\raise 0.55ex\hbox{$\scriptstyle >$}\,}
\def\lsim{\,\lower.25ex\hbox{$\scriptstyle\sim$}\kern-1.30ex%
\raise 0.55ex\hbox{$\scriptstyle <$}\,}
\newcommand{\pomfluxarg}{f_{\pom / p}\,(x_\pom)}
\newcommand{\dsf}{\mbox{$F_2^{D(3)}$}}
\newcommand{\dsfva}{\mbox{$F_2^{D(3)}(\beta,Q^2,x_{I\!\!P})$}}
\newcommand{\dsfvb}{\mbox{$F_2^{D(3)}(\beta,Q^2,x)$}}
\newcommand{\dsfpom}{$F_2^{I\!\!P}$}
\newcommand{\gap}{\stackrel{>}{\sim}}
\newcommand{\lap}{\stackrel{<}{\sim}}
\newcommand{\fem}{$F_2^{em}$}
\newcommand{\tsnmp}{$\tilde{\sigma}_{NC}(e^{\mp})$}
\newcommand{\tsnm}{$\tilde{\sigma}_{NC}(e^-)$}
\newcommand{\tsnp}{$\tilde{\sigma}_{NC}(e^+)$}
\newcommand{\st}{$\star$}
\newcommand{\sst}{$\star \star$}
\newcommand{\ssst}{$\star \star \star$}
\newcommand{\sssst}{$\star \star \star \star$}
\newcommand{\tw}{\theta_W}
\newcommand{\sw}{\sin{\theta_W}}
\newcommand{\cw}{\cos{\theta_W}}
\newcommand{\sww}{\sin^2{\theta_W}}
\newcommand{\cww}{\cos^2{\theta_W}}
\newcommand{\trm}{m_{\perp}}
\newcommand{\trp}{p_{\perp}}
\newcommand{\trmm}{m_{\perp}^2}
\newcommand{\trpp}{p_{\perp}^2}
\newcommand{\alp}{\alpha_s}

\newcommand{\alps}{\alpha_s}
\newcommand{\sqrts}{$\sqrt{s}$}
\newcommand{\LO}{$O(\alpha_s^0)$}
\newcommand{\Oa}{$O(\alpha_s)$}
\newcommand{\Oaa}{$O(\alpha_s^2)$}
\newcommand{\PT}{p_{\perp}}
\newcommand{\JPSI}{J/\psi}
\newcommand{\sh}{\hat{s}}
%\newcommand{\th}{\hat{t}}
\newcommand{\uh}{\hat{u}}
\newcommand{\MP}{m_{J/\psi}}
%\newcommand{\PO}{\mbox{l}\!\mbox{P}}
\newcommand{\PO}{I\!\!P}
\newcommand{\xbj}{x}
\newcommand{\xpom}{x_{\PO}}
\newcommand{\ttbs}{\char'134}
\newcommand{\xpomlo}{3\times10^{-4}}  
\newcommand{\xpomup}{0.05}  
\newcommand{\dgr}{^\circ}
\newcommand{\pbarnt}{\,\mbox{{\rm pb$^{-1}$}}}
\newcommand{\gev}{\,\mbox{GeV}}
\newcommand{\WBoson}{\mbox{$W$}}
\newcommand{\fbarn}{\,\mbox{{\rm fb}}}
\newcommand{\fbarnt}{\,\mbox{{\rm fb$^{-1}$}}}
%
% Some useful tex commands
%
\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{\dsiget}{\ensuremath{{\rm d}\sigma_{ep}/{\rm d}E_t^*} }
\newcommand{\dsigrap}{\ensuremath{{\rm d}\sigma_{ep}/{\rm d}\eta^*} }
% 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. Instr. and Meth.} {\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.}


\newcommand{\eega}{ $e^* \rightarrow e + \gamma $ }
\newcommand{\enwqq}{ $e^* \rightarrow \nu + W_{\hookrightarrow q q} $ }
\newcommand{\eezqq}{ $e^* \rightarrow e + Z_{\hookrightarrow q q} $ }


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                %
%    BEGINNING OF TEXT                           %
%                                                %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}


\pagestyle{empty}
\begin{titlepage}

\noindent
{\bf  H1-prelim-02-061 \hfill 
  \epsfig{file=/h1/www/images/H1logo_bw_small.epsi,width=2.cm} 
} \\
\noindent February 2002 
\\



\vspace*{3cm}

\begin{center}
  \Large
  {\bf 
        SEARCH FOR EXCITED ELECTRONS AT HERA}\\

  \vspace*{1cm}
    {\Large H1 Collaboration} 
\end{center}

\begin{abstract}
\noindent
We have performed a search for excited electron ($e^*$) production,
considering all electroweak decays \eega, $e^* \rightarrow e Z$, 
$e^* \rightarrow \nu W$ and final states resulting from Z or W hadronic decays,
using a sample of $e^{\pm}p$ events corresponding to $\rm 120~pb^{-1}$
of data collected from 1994 to 2000 with the H1 detector at HERAat a center of mass energy of 300 and 318 GeV.
No evidence for a signal is found. We derive mass dependent
exclusion limits for the ratio of the couplings to
the compositeness scale $f/\Lambda$. These limits extend the
excluded region to higher masses than has been possible
in previous searches for excited electrons.
\end{abstract}

\end{titlepage}

\pagestyle{plain}





%-----    FIGURE 1 -----------------------------------------------------------
\begin{figure}[htbp]
\begin{center}
       \epsfig{file=H1-prelim-02-061.fig1.eps,width=12cm}
      \caption{
          Invariant mass spectrum of the two electromagnetic clusters for 
          the \eega analysis. 
          Solid points correspond to the data and the histogram to the total
          expectation from different Standard Model processes.}
\end{center}
\end{figure}
%------------------------------------------------------------------------------


%-----    FIGURE 2 -----------------------------------------------------------
\begin{figure}[htbp]
\begin{center}
       \epsfig{file=H1-prelim-02-061.fig2.eps,width=12cm}
      \caption{
          Invariant mass spectrum of the electromagnetic cluster and 
          the 2 jets for the \eezqq analysis. 
          Solid points correspond to the data and the histogram to the total
          expectation from different Standard Model processes.}
\end{center}
\end{figure}
%------------------------------------------------------------------------------


%-----    FIGURE 3 -----------------------------------------------------------
\begin{figure}[htbp]
\begin{center}
       \epsfig{file=H1-prelim-02-061.fig3.eps,width=12cm}
      \caption{
          Invariant mass spectrum of the two jets and the \etm for the \enwqq analysis. 
          Solid points correspond to the data and the histogram to the total
          expectation from different Standard Model processes.}
\end{center}
\end{figure}
%--


\begin{figure}[htbp]
\begin{center}
\epsfig{file=H1-prelim-02-061.fig4.eps,width=12cm} 
\caption{Exclusion limits on the coupling $f/\Lambda$ at $95 \%$ confidence level as a function of the mass
of excited electrons with the assumptions $f=+f'$. On this figure the limit 
is shown for the combination of the 3 channels.}
\end{center}
\end{figure}

\begin{figure}[htbp]
\begin{center}

\epsfig{file=H1-prelim-02-061.fig5.eps,width=12cm} 
\caption{Exclusion limits on the coupling $f/\Lambda$ at $95 \%$ confidence level as a function of the mass
of excited electrons with the assumptions $f=+f'$. On this figure the limit 
is shown for each decay channel separately: \eega(dashed line) 
- \eezqq (dotted-dashed line) - \enwqq (dotted line)
and for the combination of the 3 channels (full line).}

\end{center}
\end{figure}

\begin{figure}[htbp]
\begin{center}

\epsfig{file=H1-prelim-02-061.fig6.eps,width=12cm} 
\caption{Exclusion limits on the coupling $f/\Lambda$ at $95 \%$ confidence level as a function of the mass
of excited electrons with the assumptions $f=+f'$. On this figure  a comparison of this analysis is made with previous 
H1 results (blue dotted line), with ZEUS results
 (green dashed line)
 and for a combination of the LEP results (green spaced-dotted line).
It must be noted that the data used in the previous H1 analysis are included in the present result.
}


\end{center}
\end{figure}

\begin{figure}[htbp]
\begin{center}


\begin{tabular}{|ll|c|c|c|}
\hline
\multicolumn{2}{|c|}{Sample} & $\epsilon$ (\%) 150-250 GeV & Data & SM exp. \\
\hline
      & $e^+p$ 820 GeV & 85-79 &  8 & $  7.2 \pm 1.0 \pm 0.1 $ \\
\eega & $e^-p$ 920 GeV & 84-74 &  4 & $  4.0 \pm 0.7 \pm 0.2 $ \\
      & $e^+p$ 920 GeV & 84-74 & 12 & $ 15.6 \pm 1.7 \pm 0.4 $ \\
\hline
       & $e^+p$ 820 GeV & 42-63 &  6 & $ 7.1 \pm 2.1 \pm 2.8$ \\
\eezqq & $e^-p$ 920 GeV & 44-63 &  4 & $ 5.6 \pm 0.4 \pm 1.2$ \\
       & $e^+p$ 920 GeV & 44-63 & 31 & $25.3 \pm 1.9 \pm 5.5$ \\
\hline
       & $e^+p$ 820 GeV & 29-53 & 2 & $ 2.4 \pm 0.2 \pm 0.7 $ \\
\enwqq & $e^-p$ 920 GeV & 28-56 & 5 & $ 3.9 \pm 0.2 \pm 0.7 $ \\
       & $e^+p$ 920 GeV & 28-56 & 8 & $ 6.1 \pm 0.4 \pm 1.5 $ \\
\hline
\end{tabular}
\begin{tabular}{ccc}
$e^+p$ 820 GeV: 37 pb$^{-1} $ &
$e^-p$ 920 GeV: 15 pb$^{-1} $ &
$e^+p$ 920 GeV: 68 pb$^{-1} $
\end{tabular}


\end{center}
\end{figure}

\end{document}