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\title{\boldmath{ $D_{s1}^-$}\ \ \ \ \ \ \ $***$}
\maketitle
This state has been observed and the mass measured. A number of decay modes have been observed and ratios of branching ratios measured although there is no fit to the branching ratios in \cite{Yao:2006px}.

  The product of the branching ratios for the production of this state in $B$-meson decays and the branching ratios has been measured. We therefore fit the data on the production of this state with either a $D$ or $D^*$ meson from \cite{Aubert:2004pw}  and \cite{Abe:2003jk}  together with the ratios of branching fractions from \cite{Krokovny:2003zq}  to obtain the branching ratios for its production in $B$ decays together with the branching fractions of $D_{s1}^-$. This assumes that $D_s^+\gamma$, $D^{*+}_s\pi^0$, $D_s^+\pi^+\pi^-$ and $D_s^+\pi^0\pi^0$ are the only modes and that the $D_s^+\pi^+\pi^-$ rate is twice $D_s^+\pi^0\pi^0$ as required by isospin. EvtGen only includes the $D^*_s\pi$ and $D_s\gamma$ modes with a higher relative branching ratio for the $D^*_s\pi$ mode.

  The width has not been measured and we use the theoretical calculation from from \cite{Bardeen:2003kt} . The $D_{s1}^-$ is allowed to be off-shell by ten times this width.

  It must be noted that due to our convention that the lighter pseudovector state is assigned to the $1^1P_1$ multiplet this is not the same assignment of PDG code as in \cite{Yao:2006px} which reverses this and the state we assign to the $1^3P_1$ mulitplet. This is the same choice as EvtGen.
The $D_{s1}^-$ has mass $2458.9$~MeV and is unstable. The $D_{s1}^-$ has spin $1$, charge $-1$ and is colour neutral.
 The $D_{s1}^-$ is a meson and is from the $1^1P_1$ multiplet.The $D_{s1}^-$ has width $0.0382$~MeV. The lower limit on the mass of the particle is $0.382$~MeV and the upper limit is $0.382$~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 -10433.
\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 $D_{s1}^-$ (continues).}
\endfoot
\caption{The decay modes of the $D_{s1}^-$.}
\endlastfoot
\label{tab:-10433decaymodes}
0.656068 & $*****$ & on & $ D_s^{*-}, \pi^0 $  & Decay of $D_{s1}^-$ to two pions with branching ratio calculated as described above.   & Herwig::PVectorMesonVectorPScalar::PVectorVP \\ 
\hline
0.206139 & $*****$ & on & $ D_s^-, \gamma $  & Radiative decay of $D_{s1}^-$ with branching ratio calculated as described above.   & Herwig::PVectorMesonVectorPScalar::PVectorVP \\ 
\hline
0.091862 & $*****$ & on & $ D_s^-, \pi^-, \pi^+ $  & Decay of $D_{s1}^-$ to two pions with branching ratio calculated as described above.   & Herwig::Hw64::DecayME0 \\ 
\hline
0.045931 & $*****$ & on & $ D_s^-, \pi^0, \pi^0 $  & Decay of $D_{s1}^-$ to two pions with branching ratio calculated as described above.   & Herwig::Hw64::DecayME0 \\ 
\hline
\end{longtable}The $D_{s1}^-$ decay modes are given in Table~\ref{tab:-10433decaymodes} and the total branching ratio is $1$.


The mass generator is \verb|D_s1+mass| for the $D_{s1}^-$.
The width generator is \verb|D_s1+width| for the $D_{s1}^-$.

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 The particle was checked by Peter Richardson at 21:24:36 on the 20th of October 2007. The most recently changed decay mode was modified at 22:27:14 on the 2nd of August 2007. The particle data was last modified at 21:41:43 on the 2nd of August 2007.

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