BOTTOM BARYONS
($\mathit B$ = $-1$)
${{\mathit \Lambda}_{{{b}}}^{0}}$ = ${{\mathit u}}{{\mathit d}}{{\mathit b}}$, ${{\mathit \Sigma}_{{{b}}}^{0}}$ = ${{\mathit u}}{{\mathit d}}{{\mathit b}}$, ${{\mathit \Sigma}_{{{b}}}^{+}}$ = ${{\mathit u}}{{\mathit u}}{{\mathit b}}$, ${{\mathit \Sigma}_{{{b}}}^{-}}$ = ${{\mathit d}}{{\mathit d}}{{\mathit b}}$
${{\mathit \Xi}_{{{b}}}^{0}}$ = ${{\mathit u}}{{\mathit s}}{{\mathit b}}$, ${{\mathit \Xi}_{{{b}}}^{-}}$ = ${{\mathit d}}{{\mathit s}}{{\mathit b}}$, ${{\mathit \Omega}_{{{b}}}^{-}}$ = ${{\mathit s}}{{\mathit s}}{{\mathit b}}$
INSPIRE   JSON PDGID:
S069

${{\mathit \Xi}_{{{b}}}^{-}}$

$I(J^P)$ = $1/2(1/2^{+})$ I, J, P need confirmation.
In the quark model, ${{\mathit \Xi}_{{{b}}}^{0}}$ and ${{\mathit \Xi}_{{{b}}}^{-}}$ are an isodoublet ($\mathit usb$, $\mathit dsb$) state; the lowest ${{\mathit \Xi}_{{{b}}}^{0}}$ and ${{\mathit \Xi}_{{{b}}}^{-}}$ ought to have $\mathit J{}^{P} = 1/2{}^{+}$. None of $\mathit I$, $\mathit J$, or ${}^{P}$ have actually been measured.
Expand/Collapse All
▸  ${{\mathit \Xi}_{{{b}}}^{-}}$ MASS
▸  ${{\mathit \Xi}_{{{b}}}^{-}}$ MEAN LIFE
▸  MEAN LIFE RATIOS
▸  $\mathit P$ VIOLATION ASYMMETRY
▸  CP VIOLATION in ${{\mathit \Xi}_{{{b}}}}$ deays
Mode  
Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level
P(MeV/c)  
$\Gamma_{1}$ ${{\mathit J / \psi}}{{\mathit \Xi}^{-}}$ ${\times }$ B(${{\mathit b}}$ $\rightarrow$ ${{\mathit \Xi}_{{{b}}}^{-}}$) ($1.02^{+0.26}_{-0.21}$) $ \times 10^{-5}$ 1782
 
$\Gamma_{2}$ ${{\mathit J / \psi}}{{\mathit \Lambda}}{{\mathit K}^{-}}$ ${\times }$ B(${{\mathit b}}$ $\rightarrow$ ${{\mathit \Xi}_{{{b}}}^{-}}$) ($2.5$ $\pm0.4$) $ \times 10^{-6}$ 1631
 
$\Gamma_{3}$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit K}^{-}}$ ${\times }$ B(${{\mathit b}}$ $\rightarrow$ ${{\mathit \Xi}_{{{b}}}^{-}}$) ($3.7$ $\pm0.8$) $ \times 10^{-8}$ 2731
 
$\Gamma_{4}$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit K}^{-}}$ ($2.3$ $\pm0.9$) $ \times 10^{-6}$ 2731
 
$\Gamma_{5}$ ${{\mathit p}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}$ $<1.3$ $\times 10^{-6}$ CL=90% 2813
 
$\Gamma_{6}$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{-}}$ ($2.3$ $\pm1.1$) $ \times 10^{-6}$ 2783
 
$\Gamma_{7}$ ${{\mathit \Lambda}_{{{b}}}^{0}}{{\mathit \pi}^{-}}$ ${\times }$ B(${{\mathit b}}$ $\rightarrow$ ${{\mathit \Xi}_{{{b}}}^{-}})/B({{\mathit b}}$ $\rightarrow$ ${{\mathit \Lambda}_{{{b}}}^{0}}$ ) ($7.0$ $\pm0.9$) $ \times 10^{-4}$ 99
 
$\Gamma_{8}$ ${{\mathit \Xi}_{{{c}}}^{0}}{{\mathit \pi}^{-}}$ seen 2367
 
$\Gamma_{9}$ ${{\mathit \Xi}_{{{c}}}^{0}}{{\mathit D}_{{{s}}}^{-}}{\times }$ B(${{\mathit b}}$ $\rightarrow$ ${{\mathit \Xi}_{{{b}}}^{-}}$ )/B(${{\mathit b}}$ $\rightarrow$ ${{\mathit \Lambda}_{{{b}}}^{0}}$ ) ($1.9$ $\pm0.5$) $ \times 10^{-3}$  
 
$\Gamma_{10}$ ${{\mathit \Sigma}{(1385)}}{{\mathit K}^{-}}$ ($2.6$ $\pm2.3$) $ \times 10^{-7}$ 2707
 
$\Gamma_{11}$ ${{\mathit \Lambda}{(1405)}}{{\mathit K}^{-}}$ ($1.9$ $\pm1.2$) $ \times 10^{-7}$ 2702
 
$\Gamma_{12}$ ${{\mathit \Lambda}{(1520)}}{{\mathit K}^{-}}$ ($7.6$ $\pm3.2$) $ \times 10^{-7}$ 2673
 
$\Gamma_{13}$ ${{\mathit \Lambda}{(1670)}}{{\mathit K}^{-}}$ ($4.5$ $\pm2.3$) $ \times 10^{-7}$ 2629
 
$\Gamma_{14}$ ${{\mathit \Sigma}{(1775)}}{{\mathit K}^{-}}$ ($2.2$ $\pm1.5$) $ \times 10^{-7}$ 2599
 
$\Gamma_{15}$ ${{\mathit \Sigma}{(1915)}}{{\mathit K}^{-}}$ ($2.6$ $\pm2.5$) $ \times 10^{-7}$ 2553
 
$\Gamma_{16}$ ${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{-}}$  
 
$\Gamma_{17}$ ${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit K}^{-}}{{\mathit K}^{-}}$  
 
$\Gamma_{18}$ ${{\mathit \Lambda}_{{{c}}}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}$  
 
$\Gamma_{19}$ ${{\mathit J / \psi}}{{\mathit \Xi}^{-}}$ seen  
 
$\Gamma_{20}$ ${{\mathit \psi}{(2S)}}{{\mathit \Xi}^{-}}$ seen  
 
$\Gamma_{21}$ ${{\mathit \Xi}^{-}}{{\mathit \gamma}}$ $<1.3$ $\times 10^{-4}$ CL=95%