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 search

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

In the quark model ${{\mathit \Sigma}_{{{b}}}^{+}}$, ${{\mathit \Sigma}_{{{b}}}^{0}}$, ${{\mathit \Sigma}_{{{b}}}^{-}}$ are an isotriplet ($\mathit uub$, $\mathit udb$, $\mathit ddb$) state. The lowest ${{\mathit \Sigma}_{{{b}}}}$ ought to have $\mathit J{}^{P} = 1/2{}^{+}$. None of $\mathit I,~J$, or $\mathit P$ have actually been measured.

${{\mathit \Sigma}_{{{b}}}}$ MASS

${{\mathit \Sigma}_{{{b}}}^{+}}$ MASS

$5810.56 \pm0.25$ MeV

${{\mathit \Sigma}_{{{b}}}^{-}}$ MASS

$5815.64 \pm0.27$ MeV

${\mathit m}_{{{\mathit \Sigma}_{{{b}}}^{+}}}–{\mathit m}_{{{\mathit \Sigma}_{{{b}}}^{-}}}$

$-5.06 \pm0.18$ MeV

${{\mathit \Sigma}_{{{b}}}}$ WIDTH

${{\mathit \Sigma}_{{{b}}}^{+}}$ WIDTH

$5.0 \pm0.5$ MeV

${{\mathit \Sigma}_{{{b}}}^{-}}$ WIDTH

$5.3 \pm0.5$ MeV

${{\boldsymbol \Sigma}_{{{b}}}}$ DECAY MODES

$\Gamma_{1}$

${{\mathit \Lambda}_{{{b}}}^{0}}{{\mathit \pi}}$

$dominant$

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