% particle data information automatically produced from the herwig database
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\title{\boldmath{ $\rho^0$}\ \ \ \ \ \ \ $*****$}
\maketitle
The $\rho^0$ is the neutral member of the isospin triplet for the $1^3S_1$ multiplet. The modes are taken from \cite{Yao:2006px} with the lepton modes averaged. The modes with photons which can be produced by QED radiation are included in the mode without the radiation. The particle is allowed to be off-shell by 500~MeV above the central value and 400~MeV below so that the $\pi\pi$ mode is kinematically allowed and not too close the threshold which can cause problems in off-shell decays.
The $\rho^0$ has mass $775.5$~MeV and is unstable. The $\rho^0$ has spin $1$, charge $0$ and is colour neutral.
 The $\rho^0$ is a meson and is from the $1^3S_1$ multiplet.The $\rho^0$ has width $149.4$~MeV. The lower limit on the mass of the particle is $400$~MeV and the upper limit is $500$~MeV. These are the deviations from the on-shell value. The branching ratios are fixed.
The properties of the particle and its antiparticle are taken to be charge-conjugate to each other.
 The PDG code is 113.
\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 $\rho^0$ (continues).}
\endfoot
\caption{The decay modes of the $\rho^0$.}
\endlastfoot
\label{tab:113decaymodes}
0.998847 & $*****$ & on & $ \pi^+, \pi^- $  & The dominant decay of the $\rho^0$, the branching ratio is one minus the sum of the other modes taken from \cite{Yao:2006px}.   & Herwig::VectorMeson2Meson::Vector2Meson \\ 
\hline
0.000600 & $****$ & on & $ \pi^0, \gamma $  & Decay of the $\rho^0$ to a pion and a photon with branching ratio taken from \cite{Yao:2006px}.   & Herwig::VectorMesonVectorPScalar::VectorVP \\ 
\hline
0.000295 & $****$ & on & $ \eta, \gamma $  & The decay of $\rho^0$ to the $\eta$ and a photon with branching ratio taken from \cite{Yao:2006px}.   & Herwig::VectorMesonVectorPScalar::VectorVP \\ 
\hline
0.000101 & $***$ & on & $ \pi^+, \pi^-, \pi^0 $  & The decay of the $\rho^0$ to three pions with branching ratio taken from \cite{Yao:2006px}.   & Herwig::Hw64::DecayME0 \\ 
\hline
0.000047 & $****$ & on & $ \mu^-, \mu^+ $  & The decay of $\rho^0$ to an muon-antimuon pair with branching ratio calculated by averaging the electron and muon modes including a phase-space factor from the decayer from \cite{Yao:2006px}.   & Herwig::VectorMeson2Fermion::Vector2Leptons \\ 
\hline
0.000047 & $****$ & on & $ e^-, e^+ $  & The decay of the $\rho^0$ to an electron and a positron calculated by averaging the electron and muon modes including a phase-space factor from the decayer from \cite{Yao:2006px}.   & Herwig::VectorMeson2Fermion::Vector2Leptons \\ 
\hline
0.000045 & $***$ & on & $ \pi^0, \pi^0, \gamma $  & Decay of the $\rho^0$ to two pions and a photon with branching ratio taken from \cite{Yao:2006px}.   & Herwig::Hw64::DecayME0 \\ 
\hline
0.000018 & $***$ & on & $ \pi^+, \pi^-, \pi^+, \pi^- $  & The decay of $\rho^0$ to four pions with branching ratio taken from \cite{Yao:2006px}.   & Herwig::Mambo::Mambo \\ 
\hline
\end{longtable}The $\rho^0$ decay modes are given in Table~\ref{tab:113decaymodes} and the total branching ratio is $1$.


The mass generator is \verb|rho0mass| for the $\rho^0$.
The width generator is \verb|rho0width| for the $\rho^0$.

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 The particle was checked by Peter Richardson at 16:22:0 on the 15th of May 2008. The most recently changed decay mode was modified at 19:14:56 on the 10th of May 2008. The particle data was last modified at 12:5:31 on the 13th of October 2006.

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