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\title{\boldmath{ ${B'}_{c1}^+$}\ \ \ \ \ \ \ $*$}
\maketitle
The ${B'}_{c1}^+$ is the second pseudovector meson containing a bottom and a charm quark. This state has not been observed and is included to complete the multiplet. The mass is taken from the lattice result in \cite{Brambilla:2004wf}  with agrees with potential model results. This mass difference with the ground state, in common with many other models, is sufficient for the ${B'}_{c1}^+$ to decay to the lighter states and either a photon or a pion pair but not to allow the decay to a $D$ and $B$ meson. 

  Although the mass difference is sufficient for the the decay to the lightest $B_c$ state and two pions to be kinematically possible this decay is not expected, see \cite{Godfrey:2004ya} , and therefore we assumed the radiative modes to the lightest pseudoscalar and vector state are the only ones. The width and branching ratios are taken from \cite{Godfrey:2004ya}  and the ${B'}_{c1}^+$ is allowed to be off-shell by ten times the width.
The ${B'}_{c1}^+$ has mass $6765$~MeV and is unstable. The ${B'}_{c1}^+$ has spin $1$, charge $1$ and is colour neutral.
 The ${B'}_{c1}^+$ is a meson and is from the $1^3P_1$ multiplet.The ${B'}_{c1}^+$ has width $0.091$~MeV. The lower limit on the mass of the particle is $0.91$~MeV and the upper limit is $0.91$~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 20543.
\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 ${B'}_{c1}^+$ (continues).}
\endfoot
\caption{The decay modes of the ${B'}_{c1}^+$.}
\endlastfoot
\label{tab:20543decaymodes}
0.880000 & $**$ & on & $ B^+_c, \gamma $  & Decay of the ${B'}_{c1}^+$ with branching ratio calculated as described above.   & Herwig::PVectorMesonVectorPScalar::PVectorVP \\ 
\hline
0.120000 & $**$ & on & $ B_c^{*+}, \gamma $  & Decay of the ${B'}_{c1}^+$ with branching ratio calculated as described above.   & Herwig::Hw64::DecayME0 \\ 
\hline
\end{longtable}The ${B'}_{c1}^+$ decay modes are given in Table~\ref{tab:20543decaymodes} and the total branching ratio is $1$.


The mass generator is \verb|B'_c1+mass| for the ${B'}_{c1}^+$.
The width generator is \verb|B'_c1+width| for the ${B'}_{c1}^+$.

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 The particle was checked by Peter Richardson at 21:30:26 on the 20th of October 2007. The most recently changed decay mode was modified at 15:56:6 on the 26th of July 2005. The particle data was last modified at 18:51:6 on the 9th of August 2007.

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