${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}}{{\mathit \pi}}$ (S-wave)   Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
M049.190
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{77}$ ${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}}{{\mathit \pi}}$ (S-wave) ($4.6$ $\pm0.7$) $ \times 10^{-5}$ 4728
Category: Radiative decays
The following data is related to the above value:
$\Gamma({{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}}{{\mathit \pi}}$ (S-wave) $)/\Gamma_{\text{total}}$
$\Gamma_{77}/\Gamma$