${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}_{{{b}}}{(1S)}}$  Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
M052.102
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{87}$ ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}_{{{b}}}{(1S)}}$ ($5.5$ ${}^{+1.1}_{-0.9}$) $ \times 10^{-4}$ S=1.2  605
Category: Radiative decays
The following data is related to the above value:
$\Gamma({{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}_{{{b}}}{(1S)}})/\Gamma_{\text{total}}$
$\Gamma_{87}/\Gamma$