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 ${\mathrm {MeV}}/\mathit c{}^{2}$
