${{\boldsymbol \Sigma}}$ BARYONS($\boldsymbol S$ = $-1$, $\boldsymbol I$ = 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 search

# ${{\boldsymbol \Sigma}{(1750)}}$ $I(J^P)$ = $1(1/2^{-})$

For most results published before 1974 (they are now obsolete), see our 1982 edition Physics Letters 111B 1 (1982). There is evidence for this state in many partial-wave analyses, but with wide variations in the mass, width, and couplings. The latest analyses indicated significant couplings to ${{\mathit N}}{{\overline{\mathit K}}}$ and ${{\mathit \Lambda}}{{\mathit \pi}}$ , as well as to ${{\mathit \Sigma}}{{\mathit \eta}}$ whose threshold is at 1746 MeV (JONES 1974 ).
${{\boldsymbol \Sigma}{(1750)}}$ POLE POSITION
 REAL PART
 $-2{\times }$IMAGINARY PART
${{\boldsymbol \Sigma}{(1750)}}$ POLE RESIDUES
 Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1750)}}$ $\rightarrow$ ${{\mathit N}}{{\overline{\mathit K}}}$
 Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1750)}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit \pi}}$
 Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1750)}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \pi}}$
 Normalized residue in ${{\mathit N}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \Sigma}{(1750)}}$ $\rightarrow$ ${{\mathit \Sigma}{(1385)}}{{\mathit \pi}}$ , ${\mathit D}{\mathrm -wave}$
 ${{\mathit \Sigma}{(1750)}}$ MASS $1730\text{ to }1800\text{ }(\approx1750)$ MeV
 ${{\mathit \Sigma}{(1750)}}$ WIDTH $60\text{ to }160\text{ }(\approx90)$ MeV