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

${{\boldsymbol \Lambda}{(1690)}}$ $I(J^P)$ = $0(3/2^{-})$ 

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).
${{\boldsymbol \Lambda}{(1690)}}$ POLE POSITION
REAL PART   $1680\text{ to }1700\text{ }(\approx1690) $ MeV 
$-2{\times }$IMAGINARY PART   $60\text{ to }80\text{ }(\approx70) $ MeV 
${{\boldsymbol \Lambda}{(1690)}}$ POLE RESIDUES
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1690)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}}$   $0.24 \pm0.05$  
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1690)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit \pi}}$   $0.35 \pm0.07$  
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1690)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \eta}}$   $0.05 \pm0.02$  
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1690)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \sigma}}$   $0.08 \pm0.02$  
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1690)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit S}{\mathrm -wave}$   $0.11 \pm0.06$  
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1690)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$   $0.06 \pm0.04$  
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1690)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , ${\mathit S}{\mathrm -wave}$   $0.05 \pm0.04$  
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1690)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , ${\mathit D}{\mathrm -wave}$   $0.18 \pm0.05$  
${{\mathit \Lambda}{(1690)}}$ MASS   $1685\text{ to }1695\text{ }(\approx1690) $ MeV 
${{\mathit \Lambda}{(1690)}}$ WIDTH   $60\text{ to }80\text{ }(\approx70) $ MeV 
$\Gamma_{1}$ ${{\mathit N}}{{\overline{\mathit K}}}$  20$-30\%$ 433
$\Gamma_{2}$ ${{\mathit \Sigma}}{{\mathit \pi}}$  20$-40\%$ 410
$\Gamma_{3}$ ${{\mathit \Lambda}}{{\mathit \sigma}}$  $(5.0\pm{2.0})\%$
$\Gamma_{4}$ ${{\mathit \Lambda}}{{\mathit \pi}}{{\mathit \pi}}$  $\sim{}25\%$ 419
$\Gamma_{5}$ ${{\mathit \Sigma}}{{\mathit \pi}}{{\mathit \pi}}$  $\sim{}20\%$ 358
$\Gamma_{6}$ ${{\mathit \Lambda}}{{\mathit \eta}}$  140
$\Gamma_{7}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit S}{\mathrm -wave}$  $(9\pm{5})\%$ 251
$\Gamma_{8}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$  $(3.0\pm{2.0})\%$ 251
$\Gamma_{9}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=1/2, ${\mathit D}{\mathrm -wave}$  -1
$\Gamma_{10}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2, ${\mathit S}{\mathrm -wave}$  -1
$\Gamma_{11}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2, ${\mathit D}{\mathrm -wave}$  -1