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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   JSON PDGID: B056

${{\mathit \Lambda}{(1830)}}$ $I(J^P)$ = $0(5/2^{-})$

For results published before 1973 (they are now obsolete), see our 1982 edition Physics Letters 111B 1 (1982). The best evidence for this resonance is in the ${{\mathit \Sigma}}{{\mathit \pi}}$ channel.

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▸  exp ${{\mathit \Lambda}{(1830)}}$ POLE POSITION

REAL PART 1800 TO 1860 $(\approx 1830 )$ MeV

$-2{\times }$IMAGINARY PART 50 TO 80 $(\approx 65 )$ MeV

▸  exp ${{\mathit \Lambda}{(1830)}}$ POLE RESIDUES

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1830)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}}$ $0.055$ $\pm0.010$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1830)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit \pi}}$ $0.15$ $\pm0.03$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1830)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \eta}}$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1830)}}$ $\rightarrow$ ${{\mathit \Xi}}{{\mathit K}}$ $0.010$ $\pm0.005$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1830)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$ $0.10$ $\pm0.04$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1830)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit G}{\mathrm -wave}$ $0.03$ $\pm0.02$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1830)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=1/2 , ${\mathit D}{\mathrm -wave}$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1830)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2 , ${\mathit D}{\mathrm -wave}$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1830)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2 , ${\mathit G}{\mathrm -wave}$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1830)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \omega}}$ , $\mathit S$=1/2 , ${\mathit D}{\mathrm -wave}$ $0.04$ $\pm0.03$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1830)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \omega}}$ , $\mathit S$=3/2 , ${\mathit D}{\mathrm -wave}$ $0.05$ $\pm0.03$

${{\mathit \Lambda}{(1830)}}$ MASS 1820 TO 1830 $(\approx 1825 )$ MeV

${{\mathit \Lambda}{(1830)}}$ WIDTH 60 TO 120 $(\approx 90 )$ MeV

${{\mathit \Lambda}{(1830)}}$ DECAY MODES

Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit N}}{{\overline{\mathit K}}}$ 0.04 to 0.08 549   $\Gamma_{2}$ ${{\mathit \Sigma}}{{\mathit \pi}}$ $(35-75) \%$ 512   $\Gamma_{3}$ ${{\mathit \Xi}}{{\mathit K}}$ 109   $\Gamma_{4}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ >15 $\%$ 370   $\Gamma_{5}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$ ($40$ $\pm15$ ) $\%$ S=3.2  370   $\Gamma_{6}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit G}{\mathrm -wave}$ 370   $\Gamma_{7}$ ${{\mathit \Lambda}}{{\mathit \eta}}$ 357   $\Gamma_{8}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=1/2, ${\mathit D}{\mathrm -wave}$ -1   $\Gamma_{9}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2, ${\mathit D}{\mathrm -wave}$ -1   $\Gamma_{10}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2, ${\mathit G}{\mathrm -wave}$ -1