${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit \eta}_{{{c}}}}$  Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
M049.153
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{28}$ ${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit \eta}_{{{c}}}}$ $<3.6 \times 10^{-6}$ CL= 90% 3345
Category: Hadronic decays
The following data is related to the above value:
$\Gamma({{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit \eta}_{{{c}}}})/\Gamma_{\text{total}}$
$\Gamma_{28}/\Gamma$