# ${{\overline{\boldsymbol p}}}$ ${{\boldsymbol p}}$ $\rightarrow$ ${{\boldsymbol \pi}}{{\boldsymbol \pi}}$ INSPIRE search

VALUE (MeV) DOCUMENT ID TECN  COMMENT
$\bf{ 250}$ OUR ESTIMATE
• • • We do not use the following data for averages, fits, limits, etc. • • •
$\sim$$70 1  1994 RVUE 0.36 - 1.55 {{\overline{\mathit p}}} {{\mathit p}} \rightarrow {{\mathit \pi}}{{\mathit \pi}} \sim$$250$ 2
 1980 B
RVUE
$\sim$$250 2  1980 C RVUE \sim$$250$ 3
 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  $\mathit I\mathit G(\mathit J{}^{P}) = 0{}^{+}(2{}^{+})$ 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 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$