${{\mathit \eta}_{{{b}}}{(1S)}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$  Decay Mode Summary INSPIRE   PDGID:
M171.5
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level
P(MeV/c)  
$\Gamma_{6}$ ${{\mathit \eta}_{{{b}}}{(1S)}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ $<9 \times 10^{-3}$ CL= 90% 4698
The following data is related to the above value: