${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}$2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}$  Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
M070.95
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{253}$ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}$2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}$ ($2.8$ $\pm0.5$) $ \times 10^{-3}$ S=1.9  1517
Category: Radiative decays
The following data is related to the above value:
$\Gamma({{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}$2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}})/\Gamma_{\text{total}}$
$\Gamma_{253}/\Gamma$