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\title{\boldmath{ $K^0_1(1400)$}\ \ \ \ \ \ \ $****$}
\maketitle
The $K^0_1(1400)$ is a mixture of the pseudovector mesons from the lightest two pseudovector multiplets. As it is heavier than the $K_1(1270)$ we have placed it in the $1^3P_1$ mulitplet. The limit on the off-shellness of the particle is set to twice the width and the $Kf_0(1370)$ mode is omitted as it is extremely off-shell.
The $K^0_1(1400)$ has mass $1402$~MeV and is unstable. The $K^0_1(1400)$ has spin $1$, charge $0$ and is colour neutral.
 The $K^0_1(1400)$ is a meson and is from the $1^3P_1$ multiplet.The $K^0_1(1400)$ has width $174$~MeV. The lower limit on the mass of the particle is $348$~MeV and the upper limit is $348$~MeV. These are the deviations from the on-shell value. The branching ratios are allowed to vary with the off-shell mass of the particle.
The properties of the particle and its antiparticle are taken to be charge-conjugate to each other.
 The PDG code is 20313.
\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 $K^0_1(1400)$ (continues).}
\endfoot
\caption{The decay modes of the $K^0_1(1400)$.}
\endlastfoot
\label{tab:20313decaymodes}
0.634005 & $****$ & on & $ K^{*+}, \pi^- $  & The decay of the $K^0_1(1400)$ to a $K^*$ and a pion. The branching ratio is from \cite{Yao:2006px} scaled up due to the absence of the $Kf_0(1370)$ mode.   & Herwig::PVectorMesonVectorPScalar::PVectorVP \\ 
\hline
0.317002 & $****$ & on & $ K^{*0}, \pi^0 $  & The decay of the $K^0_1(1400)$ to a $K^*$ and a pion. The branching ratio is from \cite{Yao:2006px} scaled up due to the absence of the $Kf_0(1370)$ mode.   & Herwig::PVectorMesonVectorPScalar::PVectorVP \\ 
\hline
0.023669 & $***$ & on & $ K^+, \rho^- $  & The decay of the $K^0_1(1400)$ to a $K$ and a rho. The branching ratio is from \cite{Yao:2006px} scaled up due to the absence of the $Kf_0(1370)$ mode.   & Herwig::PVectorMesonVectorPScalar::PVectorVP \\ 
\hline
0.011834 & $***$ & on & $ K^0, \rho^0 $  & The decay of the $K^0_1(1400)$ to a $K$ and a rho. The branching ratio is from \cite{Yao:2006px} scaled up due to the absence of the $Kf_0(1370)$ mode.   & Herwig::PVectorMesonVectorPScalar::PVectorVP \\ 
\hline
0.011834 & $***$ & on & $ K^0, \omega $  & The decay of the $K^0_1(1400)$ to a $K$ and $\omega$. The branching ratio is from \cite{Yao:2006px} scaled up due to the absence of the $Kf_0(1370)$ mode.   & Herwig::PVectorMesonVectorPScalar::PVectorVP \\ 
\hline
0.001656 & $***$ & on & $ K^0, \gamma $  & The decay of $K^0_1(1400)$ to a kaon and a photon. The branching ratio is calculated from the partial width given in \cite{Yao:2006px} and the total width.   & Herwig::PVectorMesonVectorPScalar::PVectorVP \\ 
\hline
\end{longtable}The $K^0_1(1400)$ decay modes are given in Table~\ref{tab:20313decaymodes} and the total branching ratio is $1$.


The mass generator is \verb|K'_10mass| for the $K^0_1(1400)$.
The width generator is \verb|K'_10width| for the $K^0_1(1400)$.

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 The particle was checked by Peter Richardson at 21:29:48 on the 20th of October 2007. The most recently changed decay mode was modified at 16:24:38 on the 22nd of August 2007. The particle data was last modified at 16:19:12 on the 22nd of August 2007.

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