${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit \eta}_{{{c}}}}$  Decay Mode Summary INSPIRE   PDGID:
M052.150
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level
P(MeV/c)  
$\Gamma_{19}$ ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit \eta}_{{{c}}}}$ $<5.1 \times 10^{-6}$ CL= 90% 3732
The following data is related to the above value: