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

INSPIRE

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

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).

${{\mathit \Lambda}{(2100)}}$ POLE POSITION

REAL PART   $2040 \pm14$ MeV

$-2{\times }$IMAGINARY PART   $215 \pm29$ MeV

${{\mathit \Lambda}{(2100)}}$ 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

${{\mathit \Lambda}{(2100)}}$ Decay Modes
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit N}}{{\overline{\mathit K}}}$   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   $\Gamma_{6}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$   584   $\Gamma_{7}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit G}{\mathrm -wave}$   $(1.0\pm{1.0})\%$ 584   $\Gamma_{8}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$   10$-20\%$ 515   $\Gamma_{9}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=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
FOOTNOTES