# ${{\boldsymbol \Sigma}{(1580)}}$ MASS INSPIRE search

VALUE (MeV) DOCUMENT ID TECN  COMMENT
$\bf{ \approx1580}$ OUR ESTIMATE
$1583$ $\pm4$ 1
 1976
DPWA Isospin-1 total $\sigma{}$
$1582$ $\pm4$ 2
 1974
DPWA ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \pi}^{0}}$
1  CARROLL 1976 sees a total-cross-section bump with ($\mathit J$+1/2) $\Gamma _{{\mathrm {el}}}$ $/$ $\Gamma _{{\mathrm {total}}}$ = 0.06.
2  The main effect observed by LITCHFIELD 1974 is in the ${{\mathit \Lambda}}{{\mathit \pi}}$ final state; the ${{\overline{\mathit K}}}{{\mathit N}}$ and ${{\mathit \Sigma}}{{\mathit \pi}}$ couplings are estimated from a multichannel fit including total-cross-section data of LI 1973 .
References:
 CARROLL 1976
PRL 37 806 Structures in ${{\mathit K}^{-}}$ Nucleon Total Cross Sections below 1.1 ${\mathrm {GeV/}}\mathit c$
 LITCHFIELD 1974
PL 51B 509 Spin-Parity of the ${{\mathit \Sigma}{(1580)}}$