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\title{Check List for Particle : \boldmath{ $\sigma$}}
\maketitle
\begin{center}
\begin{tabular}{|c|c|c|c||c|c|c|c|}
\hline
Quantity &\ \ \  Us \ \ \ &\ \ \ PDG \ \ \ &\ \ \  EvtGen \ \ \ & Quantity & \ \ \ Us \ \ \ & \ \ \ PDG \ \ \ & \ \ \ EvtGen \ \ \ \\ 
\hline
PDG  &9000221 & & & Mass & 860& &\\ 
Code & & & &      & & &\\ 
\hline 
Width  & 880& & & Gen  & \verb: sigma: & &\\ 
       & & & & Name & & &\\ 
\hline
Decay  & $0$~m.& & &   & & &\\ 
Length & & & & & & &\\ 
\hline 
\end{tabular} 
\end{center} 
\vspace{2cm}
\begin{center}
\begin{tabular}{|c|c|c|c|c|c|c|c|}
\hline
Latex Name  & $\sigma $ \ \ \ \ \ \ \ \ \ \ \ \ & Mass Gen.   & \verb:sigmamass: \ \ & Width Gen.  & \verb:sigmawidth: \ \ & Type        & meson \ \ \ \ \ \\ 
& & & & & & & \\ 
\hline
Type        & normal \ \ \ & Con. Mass   & 0 \ \ \ \ & Rating      &$**$ \ \ \ \ \ \ \ \ \ \ \ \ &Variable    & fixed \\ 
& & & & & & Ratio & \\ 
\hline
Stable & unstable & Spin   & $0$& Charge & $0$ & Colour & 0\\ 
&&&&&&& \\ 
 \hline
Lower Cut & 550& Upper cut & 1760& PDG link &m014 & & \\ 
\hline 
\end{tabular} 
\end{center} 
\begin{itemize}
\item Is the description present and correct?

 The $\sigma$ is the lightest scalar meson. It has been observed by a number of experiments but due to its large width it properties are poorly measured. It is only included as the external particle in a small number of decays to represent two pions in a $s$-wave state. However it is the intermediate particle in a number of hadronic matrix elements where the mass and width are determined by the matrix element. The mass and width used here are taken from \cite{Tornqvist:1995kr}  which is also used by some of the hadronic matrix elements. The lower limit on the mass is choosen above the two pion threshold to avoid inefficiency problems and given the large width we use twice the width as the upper limit.
\item References?
\end{itemize}
\setlongtables
\begin{longtable}[t]{|c|c|c|p{1in}|c|p{2.5in}|}
\hline
Branching & Rating & Outgoing  & Description & Decayer &  EvtGen \\ 
Ratio     &        & Particles &             &         & \\ 
\hline
\endhead
\caption{The decay modes of the $\sigma$ (continues).}
\endfoot
\caption{The decay modes of the $\sigma$.}
\endlastfoot
\label{tab:9000221decaymodes}
0.666667 & $***$ & $\pi^+$, $\pi^-$ & & Herwig::ScalarScalarScalar::ScalarSS& \\ 
& & & & & \\ \hline
0.333333 & $***$ & $\pi^0$, $\pi^0$ & & Herwig::ScalarScalarScalar::ScalarSS& \\ 
& & & & & \\ \hline
\end{longtable}Total branching ratio is $1$.
\bibliography{particles}

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