${{\mathit \eta}_{{{b}}}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$  Decay Mode Summary INSPIRE   PDGID:
M171.3
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level
P(MeV/c)  
$\Gamma_{5}$ ${{\mathit \eta}_{{{b}}}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ not seen 4699
The following data is related to the above value:
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