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\title{\boldmath{ $\Lambda^0$}\ \ \ \ \ \ \ $*****$}
\maketitle
 The $\Lambda^0$ is the lightest strange baryon. It is isospin neutral and decays weakly. The mass and width are very accurately measured. The branching ratios of the dominant and a number of sub-dominant decays modes have been measured.
The $\Lambda^0$ has mass $1115.683$~MeV and is unstable. The $\Lambda^0$ has spin $1/2$, charge $0$ and is colour neutral.
 The $\Lambda^0$ 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 $0.0789$~m. The PDG code is 3122.
\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 $\Lambda^0$ (continues).}
\endfoot
\caption{The decay modes of the $\Lambda^0$.}
\endlastfoot
\label{tab:3122decaymodes}
0.639167 & $*****$ & on & $ p^+, \pi^- $  & The one of the dominant decays of the $\Lambda^0$ to an anti-baryon and a pion with branching ratio taken from \cite{Yao:2006px}.   & Herwig::NonLeptonicHyperon::HyperonNL \\ 
\hline
0.358093 & $*****$ & on & $ n^0, \pi^0 $  & The one of the dominant decays of the $\Lambda^0$ to an anti-baryon and a pion with branching ratio taken from \cite{Yao:2006px}.   & Herwig::NonLeptonicHyperon::HyperonNL \\ 
\hline
0.001751 & $*****$ & on & $ n^0, \gamma $  & The radiative decay of the $\Lambda^0$ with branching ratio from \cite{Yao:2006px}.   & Herwig::RadiativeHyperon::RadiativeHyperon \\ 
\hline
0.000832 & $*****$ & on & $ p^+, e^-, \bar{\nu}_e $  & The semi-leptonic decay of $\Lambda^0$ with branching ratio from \cite{Yao:2006px}.   & Herwig::SemiLeptonicBaryon::BaryonLight1 \\ 
\hline
0.000157 & $****$ & on & $ p^+, \mu^-, \bar{\nu}_\mu $  & The semi-leptonic decay of $\Lambda^0$ with branching ratio from \cite{Yao:2006px}.   & Herwig::SemiLeptonicBaryon::BaryonLight1 \\ 
\hline
\end{longtable}The $\Lambda^0$ decay modes are given in Table~\ref{tab:3122decaymodes} and the total branching ratio is $1$.


 There is no mass generator for the $\Lambda^0$.
 There is no width generator for the $\Lambda^0$.

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 The particle was checked by Peter Richardson at 9:38:12 on the 4th of February 2009. The most recently changed decay mode was modified at 8:20:42 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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