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

${{\boldsymbol \Lambda}{(2100)}}$ $I(J^P)$ = $0(7/2^{-})$ 

Most of the results published before 1973 are now obsolete and have been omitted. They may be found in our 1982 edition Physics Letters 111B 1 (1982). This entry only includes results from partial-wave analyses. Parameters of peaks seen in cross sections and in invariant-mass distributions around 2100 MeV used to be listed in a separate entry immediately following. It may be found in our 1986 edition Physics Letters 170B 1 (1986).
${{\boldsymbol \Lambda}{(2100)}}$ POLE POSITION
REAL PART   $2040 \pm14$ MeV 
$-2{\times }$IMAGINARY PART   $215 \pm29$ MeV 
${{\boldsymbol \Lambda}{(2100)}}$ POLE RESIDUE
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(2100)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}}$   $0.28 \pm0.06$  
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(2100)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit \pi}}$   $0.09 \pm0.02$  
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(2100)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$   $0.04 \pm0.03$  
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(2100)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit G}{\mathrm -wave}$   $0.06 \pm0.03$  
Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(2100)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2, ${\mathit D}{\mathrm -wave}$   $0.11 \pm0.06$  
${{\mathit \Lambda}{(2100)}}$ MASS   $2090\text{ to }2110\text{ }(\approx2100) $ MeV 
${{\mathit \Lambda}{(2100)}}$ WIDTH   $100\text{ to }250\text{ }(\approx200) $ MeV 
$\Gamma_{1}$ ${{\mathit N}}{{\overline{\mathit K}}}$  25$-35\%$ 751
$\Gamma_{2}$ ${{\mathit \Sigma}}{{\mathit \pi}}$  $\sim{}5\%$ 705
$\Gamma_{3}$ ${{\mathit \Lambda}}{{\mathit \eta}}$  $<3\%$ 617
$\Gamma_{4}$ ${{\mathit \Xi}}{{\mathit K}}$  $<3\%$ 491
$\Gamma_{5}$ ${{\mathit \Lambda}}{{\mathit \omega}}$  $<8\%$ 443
$\Gamma_{6}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$  10$-20\%$ 515
$\Gamma_{7}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$  584
$\Gamma_{8}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit G}{\mathrm -wave}$  $(1.0\pm{1.0})\%$ 584
$\Gamma_{9}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2, ${\mathit D}{\mathrm -wave}$  $(4.0\pm{2.0})\%$ 515
$\Gamma_{10}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=1/2, ${\mathit G}{\mathrm -wave}$  515
$\Gamma_{11}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2, ${\mathit G}{\mathrm -wave}$  515