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${{\mathit \eta}}{{\mathit \pi}}$ MODE

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M012W3

VALUE (MeV) EVTS DOCUMENT ID TECN CHG  COMMENT $\bf{ 111.1 \pm2.4}$ OUR AVERAGE $115$ $\pm20$ BARBERIS 2000 H 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{{f}}}}{{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit p}_{{{s}}}}$ $112$ $\pm14$ BARBERIS 2000 H 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Delta}_{{{f}}}^{++}}{{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}_{{{s}}}}$ $112$ $\pm3$ $\pm2$ 1 AMSLER 1994 D CBAR $0.0$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$ $103$ $\pm6$ $\pm3$ BELADIDZE 1993 VES 37 ${{\mathit \pi}^{-}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit N}}$ $112.2$ $\pm5.7$ 2561 DELFOSSE 1981 SPEC + ${{\mathit \pi}^{\pm}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{\pm}}{{\mathit \eta}}$ $116.6$ $\pm7.7$ 1653 DELFOSSE 1981 SPEC - ${{\mathit \pi}^{\pm}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{\pm}}{{\mathit \eta}}$ $108$ $\pm9$ 1000 KEY 1973 OSPK - 6 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{-}}{{\mathit \eta}}$ • • We do not use the following data for averages, fits, limits, etc. • • $112$ $\pm1$ $\pm8$ 2 JACKURA 2018 RVUE ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}}$ $119$ $\pm14$ 3 ADOLPH 2015 COMP 191 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}^{(')}}{{\mathit \pi}^{-}}{{\mathit p}}$ $127$ $\pm2$ $\pm2$ 4 THOMPSON 1997 MPS 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}}$ $118$ $\pm10$ ARMSTRONG 1993 C E760 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ $\rightarrow$ 6 ${{\mathit \gamma}}$ $104$ $\pm9$ 6200 5 CONFORTO 1973 OSPK - 6 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$ MM${}^{-}$ 1  The systematic error of 2 MeV corresponds to the spread of solutions. 2  Superseded by RODAS 2019. 3  ADOLPH 2015 value is derived from a Breit-Wigner fit with mass-dependent width taking the ${{\mathit \eta}}{{\mathit \pi}}$ and ${{\mathit \rho}}{{\mathit \pi}}$ channels into account. 4  Resolution is not unfolded. 5  Missing mass with enriched MMS = ${{\mathit \eta}}{{\mathit \pi}^{-}}$, ${{\mathit \eta}}$ = 2${{\mathit \gamma}}$.

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