% particle data information automatically produced from the herwig database
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\title{\boldmath{ $\bar{K}_2(1820)^0$}\ \ \ \ \ \ \ $***$}
\maketitle
The $\bar{K}_2(1820)^0$ is one of two $2^-$ tensor kaon resonances expected at around $1800\,{\rm GeV}$, the other being the $K_2(1770)$. The mass and width are measured with reasonable accuracy however the branching ratios are poorly determined. We have therefore chosen to use the results of \cite{Daum:1981hb}  for both the $K_2(1770)$ and $K_2(1820)$ as this is the only paper with results for many of the modes. The $\bar{K}_2(1820)^0$ is allowed to be off-shell by twice the width to ensure that the decays are allowed.
The $\bar{K}_2(1820)^0$ has mass $1816$~MeV and is unstable. The $\bar{K}_2(1820)^0$ has spin $2$, charge $0$ and is colour neutral.
 The $\bar{K}_2(1820)^0$ is a meson and is from the $1^3D_2$ multiplet.The $\bar{K}_2(1820)^0$ has width $276$~MeV. The lower limit on the mass of the particle is $552$~MeV and the upper limit is $552$~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 -20315.
\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 $\bar{K}_2(1820)^0$ (continues).}
\endfoot
\caption{The decay modes of the $\bar{K}_2(1820)^0$.}
\endlastfoot
\label{tab:-20315decaymodes}
0.513333 & $***$ & on & $ K_2^{*-}(1430), \pi^+ $  & Decay of $\bar{K}_2(1820)^0$ with branching ratio taken from \cite{Daum:1981hb} .   & Herwig::Hw64::DecayME0 \\ 
\hline
0.256667 & $***$ & on & $ \bar{K}_2^{*0}(1430), \pi^0 $  & Decay of $\bar{K}_2(1820)^0$ with branching ratio taken from \cite{Daum:1981hb} .   & Herwig::Hw64::DecayME0 \\ 
\hline
0.180000 & $***$ & on & $ \bar{K}^0, f_2(1270) $  & Decay of $\bar{K}_2(1820)^0$ with branching ratio taken from \cite{Daum:1981hb}    & Herwig::Hw64::DecayME0 \\ 
\hline
0.033333 & $***$ & on & $ K^{*-}, \pi^+ $  & Decay of $\bar{K}_2(1820)^0$ with branching ratio taken from \cite{Daum:1981hb} .   & Herwig::Hw64::DecayME0 \\ 
\hline
0.016667 & $***$ & on & $ \bar{K}^{*0}, \pi^0 $  & Decay of $\bar{K}_2(1820)^0$ with branching ratio taken from \cite{Daum:1981hb} .   & Herwig::Hw64::DecayME0 \\ 
\hline
\end{longtable}The $\bar{K}_2(1820)^0$ decay modes are given in Table~\ref{tab:-20315decaymodes} and the total branching ratio is $1$.


The mass generator is \verb|K_2(1820)0Mass| for the $\bar{K}_2(1820)^0$.
The width generator is \verb|K_2(1820)0Width| for the $\bar{K}_2(1820)^0$.

\bibliography{particles}


 The particle was checked by Peter Richardson at 21:35:55 on the 20th of October 2007. The most recently changed decay mode was modified at 17:55:50 on the 15th of April 2007. The particle data was last modified at 17:53:34 on the 3rd of August 2007.

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