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${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$

INSPIRE   PDGID:

M042W1

VALUE (MeV) DOCUMENT ID TECN  COMMENT $\bf{ 250}$ OUR ESTIMATE • • We do not use the following data for averages, fits, limits, etc. • • $\sim$$70$ 1 OAKDEN 1994 RVUE $0.36 - 1.55$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ $\sim$$250$ 2 MARTIN 1980 B RVUE $\sim$$250$ 2 MARTIN 1980 C RVUE $\sim$$250$ 3 DULUDE 1978 B OSPK 1$-$2 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ 1  See however KLOET 1996 who fit ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ only and find waves only up to $\mathit J = 3$ to be important but not significantly resonant. 2  $\mathit I(\mathit J{}^{P}) = 0(2{}^{+})$ from simultaneous analysis of ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$ and ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ . 3  $\mathit I{}^{G}(\mathit J{}^{P}) = 0{}^{+}(2{}^{+})$ from partial-wave amplitude analysis.

References:

OAKDEN 1994 NP A574 731 Amplitude Analysis of Data on ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ at Low Energy MARTIN 1980C NP B169 216 Exploration of the ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ Channel in the Resonance Region MARTIN 1980B NP B176 355 Structures in ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ DULUDE 1978B PL 79B 335 Observation of Structure in ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$

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