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\title{\boldmath{ $\Omega_b^-$}\ \ \ \ \ \ \ $*$}
\maketitle
The $\Omega_b^-$ has not been observed and is only included to complete the lightest multiplet of baryons containing one bottom quark. The mass is calculated using the mass splitting from the charm system and the mass of the $\Lambda_b$ this gives a mass consistent with the theoretical calculations. In the charm system the lifetime of the $\Omega_c$ is significantly lower than the other weakly decaying charm baryons due to interference between the strange quark produced weakly and the spectators. This should not happen for the bottom system so we use the average lifetime for the $b$-baryon admixture from \cite{Yao:2006px}. 

We estimate some exclusive modes by using this estimate of the lifetime and calculated partial widths and use partonic decay modes to model the rest of the decays. The ratios of the partonic decays were calculated using the colour factor for the relative rates of the leptonic and direct $b\to c$ decays, colour exchanged decays were added with one third of the rate for the direct decays. The rates of the different quarks produced in the weak decays were calculated using the CKM matrix elements.
The $\Omega_b^-$ has mass $6035.04$~MeV and is unstable. The $\Omega_b^-$ has spin $1/2$, charge $-1$ and is colour neutral.
 The $\Omega_b^-$ is a baryon and is from the $(56,0^+_0)$ $40$plet.The properties of the particle and its antiparticle are taken to be charge-conjugate to each other.
 The decay length is $0.0003624$~m. The PDG code is 5332.
\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 $\Omega_b^-$ (continues).}
\endfoot
\caption{The decay modes of the $\Omega_b^-$.}
\endlastfoot
\label{tab:5332decaymodes}
0.222100 & $*$ & on & $ s, \bar{c}, c, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.198300 & $*$ & on & $ d, \bar{u}, c, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.091300 & $*$ & on & $ c, \bar{u}, d, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.084400 & $*$ & on & $ c, \bar{c}, s, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.048400 & $*$ & on & $ e^-, \bar{\nu}_e, \Omega_c^{*0} $  & Semi-leptonic decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Ivanov:1996fj}  and our lifetime estimate.   & Herwig::SemiLeptonicBaryon::BaryonHeavy1 \\ 
\hline
0.048400 & $*$ & on & $ \mu^-, \bar{\nu}_\mu, \Omega_c^{*0} $  & Semi-leptonic decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Ivanov:1996fj}  and our lifetime estimate.   & Herwig::SemiLeptonicBaryon::BaryonHeavy1 \\ 
\hline
0.025200 & $*$ & on & $ e^-, \bar{\nu}_e, c, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.025200 & $*$ & on & $ \mu^-, \bar{\nu}_\mu, c, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.022600 & $*$ & on & $ e^-, \bar{\nu}_e, \Omega^0_c $  & Semi-leptonic decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Ivanov:1996fj}  and our lifetime estimate.   & Herwig::SemiLeptonicBaryon::BaryonHeavy1 \\ 
\hline
0.022600 & $*$ & on & $ \mu^-, \bar{\nu}_\mu, \Omega^0_c $  & Semi-leptonic decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Ivanov:1996fj}  and our lifetime estimate.   & Herwig::SemiLeptonicBaryon::BaryonHeavy1 \\ 
\hline
0.021600 & $*$ & on & $ \Omega_c^{*0}, a_1^-(1260) $  & Decay of $\Omega_b^-$ with branching ratio calculated using form factors from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonVector \\ 
\hline
0.015600 & $*$ & on & $ \Omega^0_c, a_1^-(1260) $  & Decay of $\Omega_b^-$ with branching ratio calculated using the form factors from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonVector \\ 
\hline
0.015500 & $*$ & on & $ \Omega^0_c, D_s^- $  & Decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Cheng:1996cs}  using a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonScalar \\ 
\hline
0.013900 & $*$ & on & $ \Omega_c^{*0}, D_s^{*-} $  & Decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonVector \\ 
\hline
0.013500 & $*$ & on & $ \Omega_c^{*0}, \rho^- $  & Decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonVector \\ 
\hline
0.012800 & $*$ & on & $ \tau^-, \bar{\nu}_\tau, \Omega_c^{*0} $  & Semi-leptonic decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Ivanov:1996fj}  and our lifetime estimate.   & Herwig::SemiLeptonicBaryon::BaryonHeavy1 \\ 
\hline
0.012500 & $*$ & on & $ \Omega_c^{*0}, D_s^- $  & Decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonScalar \\ 
\hline
0.012400 & $*$ & on & $ \tau^-, \bar{\nu}_\tau, c, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.011900 & $*$ & on & $ s, \bar{u}, c, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.011100 & $*$ & on & $ \Omega^0_c, \rho^- $  & Decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Cheng:1996cs}  using a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonVector \\ 
\hline
0.011000 & $*$ & on & $ d, \bar{c}, c, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.009900 & $*$ & on & $ \Omega^0_c, D_s^{*-} $  & Decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Cheng:1996cs}  using a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonVector \\ 
\hline
0.009500 & $*$ & on & $ \Omega_c^{*0}, \pi^- $  & Decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonScalar \\ 
\hline
0.006900 & $*$ & on & $ \tau^-, \bar{\nu}_\tau, \Omega^0_c $  & Semi-leptonic decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Ivanov:1996fj}  and our lifetime estimate.   & Herwig::SemiLeptonicBaryon::BaryonHeavy1 \\ 
\hline
0.004800 & $*$ & on & $ c, \bar{c}, d, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.004800 & $*$ & on & $ c, \bar{u}, s, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.004300 & $*$ & on & $ \Omega^0_c, \pi^- $  & Decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Ivanov:1997ra}  and our value of the lifetime.   & Herwig::BaryonFactorized::BottomBaryonScalar \\ 
\hline
0.004300 & $*$ & on & $ \Omega^-, J/\psi(1S) $  & Decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Cheng:1996cs}  with a value of $a_2=0.335$ to get our value of the $\Lambda^0_b\to J/\psi\Lambda^0$ rate.   & Herwig::BaryonFactorized::BottomBaryonVector \\ 
\hline
0.002600 & $*$ & on & $ \Omega^-, \psi(2S) $  & Decay of $\Omega_b^-$ with branching ratio calculated using the partial width from \cite{Cheng:1996cs}  with a value of $a_2=0.335$ to get our value of the $\Lambda^0_b\to J/\psi\Lambda^0$ rate.   & Herwig::BaryonFactorized::BottomBaryonVector \\ 
\hline
0.002200 & $*$ & on & $ s, \bar{c}, u, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.002200 & $*$ & on & $ d, \bar{u}, u, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.001300 & $*$ & on & $ \Omega_c^{*0}, D^{*-}(2010) $  & Decay of $\Omega_b^-$ with branching ratio calculated using form factors from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonVector \\ 
\hline
0.001000 & $*$ & on & $ \Omega_c^{*0}, D^- $  & Decay of $\Omega_b^-$ with branching ratio calculated using form factors from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonScalar \\ 
\hline
0.000900 & $*$ & on & $ \Omega_c^{*0}, K^{*-} $  & Decay of $\Omega_b^-$ with branching ratio calculated using form factors from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonVector \\ 
\hline
0.000800 & $*$ & on & $ \mu^-, \bar{\nu}_\mu, u, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.000800 & $*$ & on & $ e^-, \bar{\nu}_e, u, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.000700 & $*$ & on & $ \Omega^0_c, K^{*-} $  & Decay of $\Omega_b^-$ with branching ratio calculated using the form factors from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonVector \\ 
\hline
0.000700 & $*$ & on & $ \Omega^0_c, D^{*-}(2010) $  & Decay of $\Omega_b^-$ with branching ratio calculated using the form factors from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonVector \\ 
\hline
0.000700 & $*$ & on & $ \Omega_c^{*0}, K^- $  & Decay of $\Omega_b^-$ with branching ratio calculated using form factors from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonScalar \\ 
\hline
0.000500 & $*$ & on & $ \Omega^0_c, D^- $  & Decay of $\Omega_b^-$ with branching ratio calculated using the form factors from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonScalar \\ 
\hline
0.000300 & $*$ & on & $ \tau^-, \bar{\nu}_\tau, u, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.000300 & $*$ & on & $ \Omega^0_c, K^- $  & Decay of $\Omega_b^-$ with branching ratio calculated using the form factors from \cite{Cheng:1996cs}  with a value of $a_1=1.08$ to get our value of the $\Omega_c^0\pi$ rate.   & Herwig::BaryonFactorized::BottomBaryonScalar \\ 
\hline
0.000100 & $*$ & on & $ d, \bar{c}, u, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
0.000100 & $*$ & on & $ s, \bar{u}, u, (ss)_1 $  & Partonic decay of $\Omega_b^-$ to model the inclusive modes.   & Herwig::WeakPartonic::WeakPartonic100 \\ 
\hline
\end{longtable}The $\Omega_b^-$ decay modes are given in Table~\ref{tab:5332decaymodes} and the total branching ratio is $1$.


 There is no mass generator for the $\Omega_b^-$.
 There is no width generator for the $\Omega_b^-$.

\bibliography{particles}


 The particle was checked by Peter Richardson at 9:44:4 on the 4th of February 2009. The most recently changed decay mode was modified at 10:24:31 on the 9th of September 2005. The particle data was last modified at 11:32:40 on the 6th of July 2008.

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