${{\boldsymbol \Sigma}}$ 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

${{\boldsymbol \Sigma}{(1670)}}$ $I(J^P)$ = $1(3/2^{-})$

For most results published before 1974 (they are now obsolete), see our 1982 edition Physics Letters 111B 1 (1982). Results from production experiments are listed separately in the next entry.
${{\boldsymbol \Sigma}{(1670)}}$ POLE POSITION
REAL PART   $1669 \pm7$ MeV 
$-2{\times }$IMAGINARY PART   $64 {}^{+10}_{-14}$ MeV 
${{\boldsymbol \Sigma}{(1670)}}$ POLE RESIDUES
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1670)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}}$
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1670)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit \pi}}$
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1670)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \pi}}$
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1670)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit S}{\mathrm -wave}$
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1670)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$
${{\mathit \Sigma}{(1670)}}$ MASS   $1665\text{ to }1685\text{ }(\approx1670) $ MeV 
${{\mathit \Sigma}{(1670)}}$ WIDTH   $40\text{ to }80\text{ }(\approx60) $ MeV 
$\Gamma_{1}$ ${{\mathit N}}{{\overline{\mathit K}}}$ 7$-13\%$414
$\Gamma_{2}$ ${{\mathit \Lambda}}{{\mathit \pi}}$ 5$-15\%$448
$\Gamma_{3}$ ${{\mathit \Sigma}}{{\mathit \pi}}$ 30$-60\%$394
$\Gamma_{4}$ ${{\mathit \Lambda}}{{\mathit \pi}}{{\mathit \pi}}$ 402
$\Gamma_{5}$ ${{\mathit \Sigma}}{{\mathit \pi}}{{\mathit \pi}}$ 339
$\Gamma_{6}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ 231
$\Gamma_{7}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit S}{\mathrm -wave}$ 231
$\Gamma_{8}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit S}{\mathrm -wave}$ 231
$\Gamma_{9}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$ 231
$\Gamma_{10}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=1/2, ${\mathit D}{\mathrm -wave}$ -1
$\Gamma_{11}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2, ${\mathit S}{\mathrm -wave}$ -1
$\Gamma_{12}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2, ${\mathit D}{\mathrm -wave}$ -1
$\Gamma_{13}$ ${{\mathit \Lambda}{(1405)}}{{\mathit \pi}}$ 210
$\Gamma_{14}$ ${{\mathit \Lambda}{(1520)}}{{\mathit \pi}}$ 64