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\begin{document}
\large
\begin{flushright}
FERMILAB-Conf-00/279-T  \\
SCIPP 00/37     \\
hep--ph/0010338 \\
October 31, 2000 \\
\end{flushright}
\normalsize
%\vskip1cm
\title{Report of the Tevatron Higgs Working Group}

\author{\input{author}}

%\address{(Institutions)}

% ----------- collect new commands here ------------------

\newcommand{\met}{\,/\!\!\!\!E_{T}}
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%\newcommand{\pt}{\rm p_T}

\newcommand{\pp}{p\bar{p}}
\newcommand{\qq}{q\bar{q}}
\newcommand{\bb}{b\bar{b}}
\newcommand{\cc}{c\bar{c}}

\newcommand{\ttbar}{t\bar{t}}
\newcommand{\lpm}{\ell^+\ell^-}
\newcommand{\nn}{\nu\bar{\nu}}


\newcommand{\trilep}{\ell^\pm\ell^{\prime\pm}\ell^\mp}
\newcommand{\lsdilep}{\ell^\pm\ell^\pm jj}

\newcommand{\lsim}{\stackrel{<}{\sim}}
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\newcommand{\etal}{{\em et al.}}

% --------------------------------------------------------

\maketitle

\begin{abstract}
Despite the success of the Standard Model (SM), which provides a
superb description of a wide range of experimental particle physics
data, the dynamics responsible for electroweak symmetry breaking is
still unknown.  Its elucidation remains one of the primary goals of
future high energy physics experimentation.  Present day global fits to
precision electroweak data based on the Standard Model favor the
existence of a weakly-interacting scalar Higgs boson, which is a
remnant of elementary scalar dynamics that drives electroweak symmetry
breaking.  The only known viable theoretical framework
incorporating light elementary scalar fields employs ``low-energy''
supersymmetry, where the scale of supersymmetry breaking is
${\cal O}$(1~TeV).  The Higgs sector of the Minimal
Supersymmetric extension of the Standard Model (MSSM) is of particular
interest because it predicts the existence of a light CP-even neutral
Higgs boson with a mass below about 130~GeV.  Moreover, over a
significant portion of the MSSM parameter space, the properties of
this scalar are indistinguishable from those of the SM Higgs boson.

In Run 2 at the Tevatron, the upgraded CDF and D\O\ experiments will
enjoy greatly enhanced sensitivity in the search for the SM Higgs
boson and the Higgs bosons of the MSSM.  This report presents the
theoretical analysis relevant for Higgs physics at the Tevatron
collider and documents the Higgs Working Group simulations to estimate
the discovery reach of an upgraded Tevatron for the SM and MSSM Higgs
bosons.  Based on a simple detector simulation, we have determined the
integrated luminosity necessary to discover the SM Higgs in the mass
range 100--190~GeV.  The first phase of the Run~2 Higgs search, with a
total integrated luminosity of 2 fb$^{-1}$ per detector, will provide
a 95\% CL exclusion sensitivity comparable to that expected at the
end of the LEP2 run.  With 10 fb$^{-1}$ per detector, this exclusion
will extend up to Higgs masses of 180~GeV, and a tantalizing $3\sigma$
effect will be visible if the Higgs mass lies below 125~GeV.  With 25
fb$^{-1}$ of integrated luminosity per detector, evidence for SM Higgs
production at the 3$\sigma$ level is possible for Higgs masses up to
180~GeV.  However, the discovery reach is much less impressive for
achieving a 5$\sigma$ Higgs boson signal.  Even with 30~fb$^{-1}$ per
detector, only Higgs bosons with masses up to about 130~GeV can be
detected with 5$\sigma$ significance.  These results can also be
re-interpreted in the MSSM framework and yield the required
luminosities to discover at least one Higgs boson of the MSSM Higgs
sector.  With 5--10~fb$^{-1}$ of data per detector, it will be
possible to exclude at 95\% CL nearly the entire MSSM Higgs parameter
space, whereas 20--30~fb$^{-1}$ is required to obtain a 5$\sigma$
Higgs discovery over a significant portion of the parameter space.
Moreover, in one interesting region of the MSSM parameter space (at
large $\tan\beta$), the associated production of a Higgs boson and a
$b\bar b$ pair is significantly enhanced and provides potential for
discovering a non-SM-like Higgs boson in Run~2.  Further studies
related to charged Higgs boson searches and exploiting other search
modes of the neutral Higgs bosons are underway and may enhance the
above discovery potential.
\end{abstract}


\clearpage
\pagestyle{plain}
\pagenumbering{roman}
\parskip 0.15ex
\tableofcontents
\parskip 0pt plus 1pt


\clearpage
\pagenumbering{arabic}

\section{Theoretical Aspects of Higgs Physics at the Tevatron}
				\input{theory/theory}

\section{Experimental Studies}

  \subsection{The Tevatron in Run 2}		\input{tevatron/tevatron}

  \subsection{Simulation and Analysis Methods}		\input{simana/simana}

    \subsubsection{SHW Simulation}			\input{shw/shw}

    \subsubsection{Study of $\bb$ Mass Resolution}	\input{bbmass/bbmass}

    \subsubsection{Study of $b$-jet Tagging} \input{btag/btag}

  \subsection{Low-mass Standard Model Higgs Bosons: 90--130 GeV}

    \subsubsection{$\ell\nu\bb$ Channel}		\input{whlv/whlv}

    \subsubsection{$\nn\bb$ Channel}			\input{zhvv/zhvv}

    \subsubsection{$\lpm\bb$ Channel}			\input{zhll/zhll}

    \subsubsection{$\qq\bb$ Channel}			\input{whjj/whjj}
              
    \subsubsection{Exclusive Higgs Production}		\input{pomeron/pomeron}

  \subsection{High-mass Standard Model Higgs Bosons: 130--190 GeV}  \input{highmass/intro}

  \subsubsection{$\lpm\nn$ Channel}	       	\input{highmass/dilepton}

    \subsubsection{$\lsdilep$ Channel}		\input{highmass/lslepton}
                                             \input{highmass/schmitt-ssdl.tex}

%    \subsubsection{$\trilep$ Channel}	     \input{highmass/trilepton} % removed JC 000824

  \subsection{Higgs Bosons with Enhanced Diphoton Decay Rates}
                           \input{matchev/matchev}
 
  \subsection{Enhanced MSSM Neutral Higgs Boson Production at 
              Large $\tan\beta$} 			\input{bbbb/bbbb}

  \subsection{Charged Higgs Bosons}			\input{chiggs/chiggs}

\newpage
\section{Interpretation} 

  \subsection{Combined Standard Model Higgs Boson Results}        \input{combine/combine}

  \subsection{Higgs Mass Reach in Low-Energy Supersymmetry}
                                                       \input{mssm/mssm}

\section{Summary and Conclusions}                 \input{summary/summary}

\newpage\appendix
\large
\centerline{\bf APPENDIX}\normalsize
\section{Statistical Method for Combining Channels} \input{combine/math}

%\vspace{0.2in}
%\newpage
%\large
%\begin{center}
%  {\bf APPENDIX:~~~Statistical Method for Combining Channels}
%\end{center} \normalsize				\input{combine/math}

% -------------------------------------------------------------------
\clearpage
\begin{references} 

  \input{theory/theory-biblio}

  \input{tevatron/tevatron-biblio}

  \input{shw/shw-biblio}

  \input{bbmass/bbmass-biblio}

  \input{btag/btag-biblio}

  \input{whlv/whlv-biblio} 

  \input{whlv/whlv-cdf-biblio}

  \input{whlv/whlv-shw-biblio}

  \input{whlv/whlv-nn-biblio}

  \input{zhvv/zhvv-cdf-biblio}

  \input{whjj/whjj-biblio}
  \input{whjj/whjj-extrap-biblio}
  \input{whjj/whjj-vv-biblio}

  \input{pomeron/pomeron-biblio}

  \input{highmass/intro-biblio}

  \input{highmass/dilepton-biblio}

  \input{highmass/lslepton-biblio}

  \input{matchev/matchev-biblio}

  \input{bbbb/bbbb-biblio}

  \input{chiggs/chiggs-biblio}

  \input{combine/combine-biblio}

  \input{mssm/mssm-biblio}

  \input{summary/summary-biblio}


\end{references}


\end{document}










