${{\mathit \Upsilon}{(4S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(2S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$  Decay Mode Summary INSPIRE   PDGID:
M047.9
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level
P(MeV/c)  
$\Gamma_{21}$ ${{\mathit \Upsilon}{(4S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(2S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ ($8.2$ $\pm0.8$) $ \times 10^{-5}$ 468
The following data is related to the above value:
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