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${{\mathit \Sigma}{(1670)}}$ MASS (PRODUCTION EXPERIMENTS)

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B051M

VALUE (MeV) EVTS DOCUMENT ID TECN CHG  COMMENT $\bf{ \approx{}\text{ 1670}}$ OUR ESTIMATE $1670$ $\pm4$ 1 CARROLL 1976 DPWA Isospin-1 total $\sigma{}$ $1675$ $\pm10$ 2 HEPP 1976 DBC - ${{\mathit K}^{-}}{{\mathit N}}$ 1.6$-$1.75 ${\mathrm {GeV/}}\mathit c$ $1665$ $\pm1$ APSELL 1974 HBC ${{\mathit K}^{-}}{{\mathit p}}$ 2.87 ${\mathrm {GeV/}}\mathit c$ $1688$ $\pm2$ 1.2k BERTHON 1974 HBC 0 Quasi-2-body $\sigma{}$ $1670$ $\pm6$ AGUILAR-BENIT.. 1970 B HBC ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Sigma}}{{\mathit \pi}}{{\mathit \pi}}$ 4 GeV $1668$ $\pm10$ AGUILAR-BENIT.. 1970 B HBC ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Sigma}}$3 ${{\mathit \pi}}$ 4 GeV $1660$ $\pm10$ ALVAREZ 1963 HBC + ${{\mathit K}^{-}}{{\mathit p}}$ 1.51 ${\mathrm {GeV/}}\mathit c$ • • We do not use the following data for averages, fits, limits, etc. • • $1668$ $\pm10$ 150 3 FERRERSORIA 1981 OMEG - ${{\mathit \pi}^{-}}{{\mathit p}}$ 9,12 ${\mathrm {GeV/}}\mathit c$ $1655\text{ to }1677 $ TIMMERMANS 1976 HBC + ${{\mathit K}^{-}}{{\mathit p}}$ 4.2 ${\mathrm {GeV/}}\mathit c$ $1665$ $\pm5$ BUGG 1968 CNTR ${{\mathit K}^{-}}{{\mathit p}}$, ${{\mathit d}}$ total $\sigma $ $1661$ $\pm9$ 70 PRIMER 1968 HBC + See BARNES 1969E $1685$ ALEXANDER 1962 C HBC -0 ${{\mathit \pi}^{-}}{{\mathit p}}$ 2$-$2.2 ${\mathrm {GeV/}}\mathit c$ 1  Total cross-section bump with ($\mathit J$+1/2) $\Gamma _{{\mathrm {el}}}$ $/$ $\Gamma _{{\mathrm {total}}}$ = 0.23. 2  Enhancements in ${{\mathit \Sigma}}{{\mathit \pi}}$ and ${{\mathit \Sigma}}{{\mathit \pi}}{{\mathit \pi}}$ cross sections. 3  Backward production in the ${{\mathit \Lambda}}{{\mathit \pi}^{-}}{{\mathit K}^{+}}$ final state.

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