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$\mathit S$-CHANNEL ${{\overline{\mathit p}}}{{\mathit p}}$ or ${{\overline{\mathit N}}}{{\mathit N}}$

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M041W2

VALUE (MeV) DOCUMENT ID TECN  COMMENT • • We do not use the following data for averages, fits, limits, etc. • • $310$ $\pm25$ 1 ANISOVICH 2000 J SPEC $135$ ${}^{+150}_{-65}$ 2, 3 COUPLAND 1977 CNTR 0.7$-$2.4 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\overline{\mathit p}}}{{\mathit p}}$ $165$ ${}^{+18}_{-8}$ 3 ALSPECTOR 1973 CNTR ${{\overline{\mathit p}}}{{\mathit p}}$ $\mathit S$ channel $\sim$$190$ ABRAMS 1970 CNTR $\mathit S$ channel ${{\overline{\mathit N}}}{{\mathit N}}$ 1  From the combined analysis of ANISOVICH 1999C and ANISOVICH 1999F on ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$, ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$, ${{\mathit \eta}}{{\mathit \eta}}$, ${{\mathit \eta}}{{\mathit \eta}^{\,'}}$, ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$. 2  From a fit to the total elastic cross section. 3  Isospins 0 and 1 not separated.

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