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

${{\boldsymbol \Lambda}{(1670)}}$ $I(J^P)$ = $0(1/2^{-})$

The measurements of the mass, width, and elasticity published before 1974 are now obsolete and have been omitted. They were last listed in our 1982 edition Physics Letters 111B 1 (1982).
${{\boldsymbol \Lambda}{(1670)}}$ POLE POSITIONS
REAL PART   $1669 {}^{+3}_{-8}$ MeV 
$-2{\times }$IMAGINARY PART   $19 {}^{+18}_{-2}$ MeV 
${{\boldsymbol \Lambda}{(1670)}}$ POLE RESIDUES
Normalized residue in ${{\overline{\mathit K}}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \Lambda}{(1670)}}$ $\rightarrow$ ${{\overline{\mathit K}}}{{\mathit N}}$
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1670)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit \pi}}$
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1670)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \eta}}$
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1670)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$
${{\mathit \Lambda}{(1670)}}$ MASS   $1660\text{ to }1680\text{ }(\approx1670) $ MeV 
${{\mathit \Lambda}{(1670)}}$ WIDTH   $25\text{ to }50\text{ }(\approx35) $ MeV 
$\Gamma_{1}$ ${{\mathit N}}{{\overline{\mathit K}}}$ 20$-30\%$414
$\Gamma_{2}$ ${{\mathit \Sigma}}{{\mathit \pi}}$ 25$-55\%$394
$\Gamma_{3}$ ${{\mathit \Lambda}}{{\mathit \eta}}$ 10$-25\%$69
$\Gamma_{4}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$ 231
$\Gamma_{5}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=1/2, ${\mathit S}{\mathrm -wave}$ -1
$\Gamma_{6}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2, ${\mathit D}{\mathrm -wave}$ $(5\pm{4})\%$-1