#### ${{\overline{\boldsymbol p}}}$ ${{\boldsymbol p}}$ $\rightarrow$ ${{\boldsymbol \pi}}{{\boldsymbol \pi}}$ or ${{\overline{\boldsymbol K}}}{{\boldsymbol K}}$

VALUE (MeV) DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
$\sim$$2314  1994 RVUE {{\overline{\mathit p}}} {{\mathit p}} \rightarrow {{\mathit \pi}}{{\mathit \pi}} \sim$$2300$ 1
 1980 B
RVUE
$\sim$$2300 1  1980 C RVUE \sim$$2340$ 2
 1978 B
CNTR 0.7$-$2.4 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit K}^{+}}$
$\sim$$2330  1978 B OSPK 1-2 {{\overline{\mathit p}}} {{\mathit p}} \rightarrow {{\mathit \pi}^{0}}{{\mathit \pi}^{0}} \sim$$2310$ 3
 1977
CNTR 0.7$-$2.4 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$
 1 $\mathit I(\mathit J{}^{P}) = 0(4{}^{+})$ from simultaneous analysis of ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$ and ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ .
 2 $\mathit I(\mathit J{}^{P}) = 0(4{}^{+})$ from Barrelet-zero analysis.
 3 $\mathit I(\mathit J{}^{P}) = 0(4{}^{+})$ from amplitude analysis.
References:
 HASAN 1994
PL B334 215 Amplitudes for ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ from 0.36 to 2.5 ${\mathrm {GeV/}}\mathit c$
 MARTIN 1980B
NP B176 355 Structures in ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$
 MARTIN 1980C
NP B169 216 Exploration of the ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ Channel in the Resonance Region
 CARTER 1978B
NP B141 467 Evidence for New Meson Resonances from the Reaction ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit K}^{+}}$
 DULUDE 1978B
PL 79B 335 Observation of Structure in ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
 CARTER 1977
PL 67B 117 Evidence for Mesons with Spins 3, 4 and 5 in ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$ in the Mass Region 2020 to 2580 ${\mathrm {MeV}}/\mathit c{}^{2}$