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\title{\boldmath{ $\chi_{b1}(1P)$}\ \ \ \ \ \ \ $***$}
\maketitle
The second pseudovector $b\bar{b}$ state. The mass is taken from \cite{Yao:2006px} but the width has not been measured. The branching ratio is only known for one mode the rest are simulated using partonic decays. The width is taken from \cite{Kwong:1988ae}  and the $\chi_{b1}(1P)$ is allowed to be off-shell by ten times this width.
The $\chi_{b1}(1P)$ has mass $9892.78$~MeV and is unstable. The $\chi_{b1}(1P)$ has spin $1$, charge $0$ and is colour neutral.
 The $\chi_{b1}(1P)$ is a meson and is from the $1^3P_1$ multiplet.The $\chi_{b1}(1P)$ has width $0.071$~MeV. The lower limit on the mass of the particle is $0.71$~MeV and the upper limit is $0.71$~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 20553.
\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 $\chi_{b1}(1P)$ (continues).}
\endfoot
\caption{The decay modes of the $\chi_{b1}(1P)$.}
\endlastfoot
\label{tab:20553decaymodes}
0.650000 & $**$ & on & $ g, g $  & The two gluon decay of $\chi_{b1}(1P)$ is included to ensure the branching ratios sum to one.   & Herwig::Quarkonium::QDecayME0 \\ 
\hline
0.350000 & $****$ & on & $ \Upsilon(1S), \gamma $  & Radiative decay of $\chi_{b1}(1P)$ with branching ratio from \cite{Yao:2006px}.   & Herwig::Hw64::DecayME0 \\ 
\hline
\end{longtable}The $\chi_{b1}(1P)$ decay modes are given in Table~\ref{tab:20553decaymodes} and the total branching ratio is $1$.


The mass generator is \verb|chi_b11Pmass| for the $\chi_{b1}(1P)$.
The width generator is \verb|chi_b11Pwidth| for the $\chi_{b1}(1P)$.

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 The particle was checked by Peter Richardson at 20:51:47 on the 23rd of April 2007. The most recently changed decay mode was modified at 22:10:37 on the 29th of July 2005. The particle data was last modified at 20:32:58 on the 4th of November 2006.

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