${{\boldsymbol \Sigma}}$ BARYONS
($\boldsymbol S$ = $-1$, $\boldsymbol I$ = 1)
${{\mathit \Sigma}^{+}}$ = ${\mathit {\mathit u}}$ ${\mathit {\mathit u}}$ ${\mathit {\mathit s}}$, ${{\mathit \Sigma}^{0}}$ = ${\mathit {\mathit u}}$ ${\mathit {\mathit d}}$ ${\mathit {\mathit s}}$, ${{\mathit \Sigma}^{-}}$ = ${\mathit {\mathit d}}$ ${\mathit {\mathit d}}$ ${\mathit {\mathit s}}$

INSPIRE search

${{\boldsymbol \Sigma}{(2070)}}$ $I(J^P)$ = $1(5/2^{+})$

This state suggested by BERTHON 1970B finds support in GOPAL 1980 with new ${{\mathit K}^{-}}{{\mathit p}}$ polarization and ${{\mathit K}^{-}}{{\mathit n}}$ angular distributions. The very broad state seen in KANE 1972 is not required in the later (KANE 1974 ) analysis of ${{\overline{\mathit K}}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit \pi}}$ .

${{\mathit \Sigma}{(2070)}}$ MASS

$2020\text{ to }2100\text{ }(\approx2060) $ MeV

${{\mathit \Sigma}{(2070)}}$ WIDTH

$100\text{ to }300\text{ }(\approx200) $ MeV

Decay Modes

$\Gamma_{1}$

${{\mathit N}}{{\overline{\mathit K}}}$

723

$\Gamma_{2}$

${{\mathit \Sigma}}{{\mathit \pi}}$

678