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BOTTOM BARYONS ($\mathit B$ = $-1$) ${{\mathit \Lambda}_{{b}}^{0}}$ = ${{\mathit u}}{{\mathit d}}{{\mathit b}}$ , ${{\mathit \Xi}_{{b}}^{0}}$ = ${{\mathit u}}{{\mathit s}}{{\mathit b}}$ , ${{\mathit \Xi}_{{b}}^{-}}$ = ${{\mathit d}}{{\mathit s}}{{\mathit b}}$ , ${{\mathit \Omega}_{{b}}^{-}}$ = ${{\mathit s}}{{\mathit s}}{{\mathit b}}$

INSPIRE   JSON  (beta) PDGID: S063

${{\mathit \Omega}_{{b}}^{-}}$ $I(J^P)$ = $0(1/2^{+})$ I, J, P need confirmation.

In the quark model ${{\mathit \Omega}_{{b}}^{-}}$ is $\mathit ssb$ ground state. None of its quantum numbers has been measured.

${{\mathit \Omega}_{{b}}^{-}}$ MASS   $6045.2 \pm1.2$ MeV

${\mathit m}_{{{\mathit \Omega}_{{b}}^{-}}}–{\mathit m}_{{{\mathit \Lambda}_{{b}}^{0}}}$   $426.4 \pm2.2$ MeV

${\mathit m}_{{{\mathit \Omega}_{{b}}^{-}}}–{\mathit m}_{{{\mathit \Xi}_{{b}}^{-}}}$   $247.3 \pm3.2$ MeV

${{\mathit \Omega}_{{b}}}$ MEAN LIFE   $(1.64 {}^{+0.18}_{-0.17}) \times 10^{-12}$ s

$\tau ({{\mathit \Omega}_{{b}}^{-}})/\tau ({{\mathit \Xi}_{{b}}^{-}}$) mean life ratio   $1.11 \pm0.16$

Decay Modes
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit J / \psi}}{{\mathit \Omega}^{-}}$ ${\times }$B( ${{\mathit b}}$ $\rightarrow$ ${{\mathit \Omega}_{{b}}}$ )   $(2.9^{+1.1}_{-0.8})\times 10^{-6}$ 1805   $\Gamma_{2}$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit K}^{-}}$ ${\times }$B( ${{\overline{\mathit b}}}$ $\rightarrow$ ${{\mathit \Omega}_{{b}}}$ )   $<2.3\times 10^{-9}$ CL=90% 2865   $\Gamma_{3}$ ${{\mathit p}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}$ ${\times }$B( ${{\overline{\mathit b}}}$ $\rightarrow$ ${{\mathit \Omega}_{{b}}}$ )   $<1.5\times 10^{-8}$ CL=90% 2943   $\Gamma_{4}$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{-}}$ ${\times }$B( ${{\overline{\mathit b}}}$ $\rightarrow$ ${{\mathit \Omega}_{{b}}}$ )   $<7\times 10^{-9}$ CL=90% 2915   $\Gamma_{5}$ ${{\mathit \Omega}_{{c}}^{0}}{{\mathit \pi}^{-}}$   seen 2419   $\Gamma_{6}$ ${{\mathit \Omega}_{{c}}^{0}}{{\mathit \pi}^{-}}$ , ${{\mathit \Omega}_{{c}}^{0}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$   seen     $\Gamma_{7}$ ${{\mathit \Xi}_{{c}}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{-}}$   seen 2472
FOOTNOTES