${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \eta}}$   Decay Mode Summary INSPIRE   PDGID:
M048.9
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{8}$ ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \eta}}$ $<1 \times 10^{-4}$ CL= 90% 677
The following data is related to the above value:
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$\Gamma($ ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \eta}}$ $)/\Gamma($ ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $)$
$\Gamma_{8}/\Gamma_{6}$
$\Gamma($ ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \eta}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{8}/\Gamma$