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${{\mathit \Sigma}}$ BARYONS
($\mathit S$ = $-1$, $\mathit I$ = 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 JSON (beta) PDGID:

${{\mathit \Sigma}{(1660)}}$

$I(J^P)$ = $1(1/2^{+})$

For results published before 1974 (they are now obsolete), see our 1982 edition Physics Letters 111B 1 (1982).

${{\mathit \Sigma}{(1660)}}$ POLE POSITION

$1585 \pm20$ MeV

$-2{\times }$IMAGINARY PART

$290 {}^{+140}_{-40}$ MeV

${{\mathit \Sigma}{(1660)}}$ POLE RESIDUES

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1660)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}}$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1660)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit \pi}}$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1660)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \pi}}$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1660)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit \sigma}}$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1660)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1660)}}$ $\rightarrow$ ${{\mathit \Lambda}{(1405)}}{{\mathit \pi}}$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1660)}}$ $\rightarrow$ ${{\mathit \Lambda}{(1520)}}{{\mathit \pi}}$

${{\mathit \Sigma}{(1660)}}$ MASS

$1640\text{ to }1680\text{ }(\approx1660) $ MeV

${{\mathit \Sigma}{(1660)}}$ WIDTH

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

${{\mathit \Sigma}{(1660)}}$ DECAY MODES

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

0.05 to 010 to 0.15

${{\mathit \Lambda}}{{\mathit \pi}}$

$(35\pm{12})\%$

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

$(37\pm{10})\%$

${{\mathit \Sigma}}{{\mathit \sigma}}$

${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$

${{\mathit \Lambda}{(1405)}}{{\mathit \pi}}$

$(4.0\pm{2.0})\%$

${{\mathit \Lambda}{(1520)}}{{\mathit \pi}}$

FOOTNOTES

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