pdgLive Home   >   Baryon Summary Table   >   ${{\mathit \Sigma}{(1915)}}$

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

INSPIRE   JSON PDGID: B046

${{\mathit \Sigma}{(1915)}}$ $I(J^P)$ = $1(5/2^{+})$

Discovered by COOL 1966. For results published before 1974 (they are now obsolete), see 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 invariant-mass distributions in this region used to be listed in in a separate entry immediately following. They may be found in our 1986 edition Physics Letters 170B 1 (1986).

Expand/Collapse All

▸  exp ${{\mathit \Sigma}{(1915)}}$ POLE POSITION

REAL PART 1885 TO 1915 $(\approx 1900 )$ MeV

$-2{\times }$IMAGINARY PART 90 TO 110 $(\approx 100 )$ MeV

▸  exp ${{\mathit \Sigma}{(1915)}}$ POLE RESIDUES

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1915)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}}$ $0.08$ $\pm0.02$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1915)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit \pi}}$ $0.09$ $\pm0.02$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1915)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \pi}}$ $0.07$ $\pm0.02$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1915)}}$ $\rightarrow$ ${{\mathit \Xi}}{{\mathit K}}$ $0.02$ $\pm0.01$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1915)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit P}{\mathrm -wave}$ $0.02$ $\pm0.02$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Lambda}{(1915)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit F}{\mathrm -wave}$ $0.05$ $\pm0.03$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1915)}}$ $\rightarrow$ ${{\mathit \Lambda}{(1520)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$ $0.08$ $\pm0.02$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1915)}}$ $\rightarrow$ ${{\mathit \Delta}}{{\overline{\mathit K}}}$ , ${\mathit P}{\mathrm -wave}$ $0.12$ $\pm0.03$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1915)}}$ $\rightarrow$ ${{\mathit \Delta}}{{\overline{\mathit K}}}$ , ${\mathit F}{\mathrm -wave}$ $0.07$ $\pm0.02$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1915)}}$ $\rightarrow$ ${{\mathit \Lambda}{(1520)}}{{\mathit \pi}}$ , ${\mathit G}{\mathrm -wave}$ $0.01$ $\pm0.01$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1915)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=1/2 , ${\mathit F}{\mathrm -wave}$ $0.07$ $\pm0.04$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1915)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2 , ${\mathit P}{\mathrm -wave}$

Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1915)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2 , ${\mathit F}{\mathrm -wave}$ $0.07$ $\pm0.03$

${{\mathit \Sigma}{(1915)}}$ MASS 1900 TO 1935 $(\approx 1915 )$ MeV

${{\mathit \Sigma}{(1915)}}$ WIDTH 80 TO 160 $(\approx 120 )$ MeV

${{\mathit \Sigma}{(1915)}}$ DECAY MODES

Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit N}}{{\overline{\mathit K}}}$ 0.05 TO 0.15 618   $\Gamma_{2}$ ${{\mathit \Lambda}}{{\mathit \pi}}$ ($6.0$ $\pm2.0$ ) $\%$ 623   $\Gamma_{3}$ ${{\mathit \Sigma}}{{\mathit \pi}}$ ($10.0$ $\pm2.0$ ) $\%$ 577   $\Gamma_{4}$ ${{\mathit \Xi}}{{\mathit K}}$ 284   $\Gamma_{5}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ 443   $\Gamma_{6}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit P}{\mathrm -wave}$ ($2.0$ $\pm2.0$ ) $\%$ 443   $\Gamma_{7}$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit F}{\mathrm -wave}$ ($4.0$ $\pm2.0$ ) $\%$ 443   $\Gamma_{8}$ ${{\mathit \Lambda}{(1520)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$ ($8.0$ $\pm2.0$ ) $\%$ 334   $\Gamma_{9}$ ${{\mathit \Lambda}{(1520)}}{{\mathit \pi}}$ , ${\mathit G}{\mathrm -wave}$ 334   $\Gamma_{10}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=1/2, ${\mathit F}{\mathrm -wave}$ ($5.0$ $\pm3.0$ ) $\%$ 282   $\Gamma_{11}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2, ${\mathit P}{\mathrm -wave}$ 282   $\Gamma_{12}$ ${{\mathit N}}{{\overline{\mathit K}}^{*}{(892)}}$ , $\mathit S$=3/2, ${\mathit F}{\mathrm -wave}$ ($5.0$ $\pm2.0$ ) $\%$ 282   $\Gamma_{13}$ ${{\mathit \Delta}}{{\overline{\mathit K}}}$ , ${\mathit P}{\mathrm -wave}$ ($16$ $\pm5$ ) $\%$ 383   $\Gamma_{14}$ ${{\mathit \Delta}}{{\overline{\mathit K}}}$ , ${\mathit F}{\mathrm -wave}$ ($5.0$ $\pm3.0$ ) $\%$ 383