${{\boldsymbol \Sigma}}$ 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

${{\boldsymbol \Sigma}{(1940)}}$ $I(J^P)$ = $1(3/2^{-})$

For results published before 1974 (they are now obsolete), see our 1982 edition Physics Letters 111B 1 (1982). Not all analyses require this state. It is not required by the GOYAL 1977 analysis of ${{\mathit K}^{-}}$ ${{\mathit n}}$ $\rightarrow$ nor by the GOPAL 1980 analysis of ${{\mathit K}^{-}}$ ${{\mathit n}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit n}}$ . See also HEMINGWAY 1975 .
 ${{\mathit \Sigma}{(1940)}}$ MASS $1900\text{ to }1950\text{ }(\approx1940)$ MeV
 ${{\mathit \Sigma}{(1940)}}$ WIDTH $150\text{ to }300\text{ }(\approx220)$ MeV