${{\overline{\mathit b}}}$ $\rightarrow$ ${{\mathit \eta}_{{{c}}}{(2S)}}$ anything , ${{\mathit \eta}_{{{c}}}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \phi}}$  Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
S051.228
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{57}$ ${{\overline{\mathit b}}}$ $\rightarrow$ ${{\mathit \eta}_{{{c}}}{(2S)}}$ anything , ${{\mathit \eta}_{{{c}}}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \phi}}$ ($4.1$ $\pm1.6$) $ \times 10^{-7}$
Category: Charmonium modes
The following data is related to the above value:
$\Gamma({{\overline{\mathit b}}}$ $\rightarrow$ ${{\mathit \eta}_{{{c}}}{(2S)}}$ anything , ${{\mathit \eta}_{{{c}}}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \phi}})/\Gamma({{\overline{\mathit b}}}$ $\rightarrow$ ${{\mathit \eta}_{{{c}}}{(1S)}}$ anything$)$
$\Gamma_{57}/\Gamma_{56}$