${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit a}_{{{2}}}{(1320)}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ + c.c $\rightarrow$ 2 ( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) ${{\mathit \pi}^{0}}$  Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
M070.443
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{14}$ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit a}_{{{2}}}{(1320)}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ + c.c $\rightarrow$ 2 ( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) ${{\mathit \pi}^{0}}$ ($3.7$ $\pm0.7$) $ \times 10^{-3}$
Category: Decays involving hadronic resonances
The following data is related to the above value:
$\Gamma({{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit a}_{{{2}}}{(1320)}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ + c.c $\rightarrow$ 2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) ${{\mathit \pi}^{0}})/\Gamma_{\text{total}}$
$\Gamma_{14}/\Gamma$