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\title{\boldmath{ $\Xi^-$}\ \ \ \ \ \ \ $*****$}
\maketitle
 The $\Xi^-$ is the charged doubly strange member of the lightest $SU(3)$ decuplet. The mass and lifetime are accurately measured as is the branching ratio for the dominant and several sub-dominant modes.
The $\Xi^-$ has mass $1321.31$~MeV and is unstable. The $\Xi^-$ has spin $1/2$, charge $-1$ and is colour neutral.
 The $\Xi^-$ is a baryon and is from the $(56,0^+_0)$ $40$plet.The properties of the particle and its antiparticle are taken to be charge-conjugate to each other.
 The decay length is $0.0491$~m. The PDG code is 3312.
\setlongtables
\begin{longtable}[t]{|c|c|c|p{1in}|p{2.5in}|c|}
\hline
Branching & Rating & On/ & Outgoing  & Description & Decayer  \\ 
Ratio     &                                 & Off & Particles &             &         \\ 
\hline
\endhead
\caption{The decay modes of the $\Xi^-$ (continues).}
\endfoot
\caption{The decay modes of the $\Xi^-$.}
\endlastfoot
\label{tab:3312decaymodes}
0.998873 & $*****$ & on & $ \Lambda^0, \pi^- $  & The dominant decay of the $\Xi^-$ with branching ratio from \cite{Yao:2006px}.   & Herwig::NonLeptonicHyperon::HyperonNL \\ 
\hline
0.000563 & $*****$ & on & $ \Lambda^0, e^-, \bar{\nu}_e $  & Semi-leptonic decay of the $\Xi^-$ with branching ratio from \cite{Yao:2006px}.   & Herwig::SemiLeptonicBaryon::BaryonLight1 \\ 
\hline
0.000350 & $****$ & on & $ \Lambda^0, \mu^-, \bar{\nu}_\mu $  & Semi-leptonic decay of the $\Xi^-$ with branching ratio from \cite{Yao:2006px}.   & Herwig::SemiLeptonicBaryon::BaryonLight1 \\ 
\hline
0.000127 & $*****$ & on & $ \Sigma^-, \gamma $  & Radiative decay of the $\Xi^-$ with branching ratio from \cite{Yao:2006px}.   & Herwig::RadiativeHyperon::RadiativeHyperon \\ 
\hline
0.000087 & $****$ & on & $ \Sigma^0, e^-, \bar{\nu}_e $  & Semi-leptonic decay of the $\Xi^-$ with branching ratio from \cite{Yao:2006px}.   & Herwig::SemiLeptonicBaryon::BaryonLight1 \\ 
\hline
\end{longtable}The $\Xi^-$ decay modes are given in Table~\ref{tab:3312decaymodes} and the total branching ratio is $1$.


 There is no mass generator for the $\Xi^-$.
 There is no width generator for the $\Xi^-$.

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 The particle was checked by Peter Richardson at 9:38:19 on the 4th of February 2009. The most recently changed decay mode was modified at 8:17:18 on the 29th of June 2008. The particle data was last modified at 16:24:39 on the 10th of October 2006.

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