${{\mathit \Sigma}}$ 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:
B118

${{\mathit \Sigma}{(3170)}}$ Bumps

$I(J^P)$ = $1(?^{?})$ 
Seen by AMIRZADEH 1979 as a narrow 6.5-standard-deviation enhancement in the reaction ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit Y}^{*+}}{{\mathit \pi}^{-}}$ using data from independent high statistics bubble chamber experiments at 8.25 and 6.5 ${\mathrm {GeV/}}\mathit c$. The dominant decay modes are multibody, multistrange final states and the production is via isospin-${}^{}3/2{}^{}$ baryon exchange. Isospin ${}^{}1{}^{}$ is favored. Not seen in a ${{\mathit K}^{-}}{{\mathit p}}$ experiment in LASS at 11 ${\mathrm {GeV/}}\mathit c$ (ASTON 1985B).
${{\mathit \Sigma}{(3170)}}$ MASS (PRODUCTION EXPERIMENTS) ~3170 MeV 
 
${{\mathit \Sigma}{(3170)}}$ WIDTH (PRODUCTION EXPERIMENTS)
 
Mode  
Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{1}$ ${{\mathit \Lambda}}{{\mathit K}}{{\overline{\mathit K}}}$ seen  
 
$\Gamma_{2}$ ${{\mathit \Sigma}}{{\mathit K}}{{\overline{\mathit K}}}$ seen  
 
$\Gamma_{3}$ ${{\mathit \Xi}}{{\mathit K}}$ seen