${{\mathit \Sigma}}$ 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  (beta) PDGID:
B078

${{\mathit \Sigma}{(1620)}}$ Production Experiments

$I(J^P)$ = $1(?^{?})$ 
Formation experiments are listed separately in the previous entry. The results of CRENNELL 1969B at 3.9 ${\mathrm {GeV/}}\mathit c$ are not confirmed by SABRE 1970 at 3.0 ${\mathrm {GeV/}}\mathit c$. However, at 4.5 ${\mathrm {GeV/}}\mathit c$, AMMANN 1970 sees a peak at 1642 MeV which on the basis of branching ratios they do not associate with the ${{\mathit \Sigma}{(1670)}}$. See MILLER 1970 for a review of these conflicts.
FOOTNOTES