${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit A}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit g}}{{\mathit g}}$  Decay Mode Summary INSPIRE   PDGID:
M049.129
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{125}$ ${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit A}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit g}}{{\mathit g}}$ $<0.01$ CL= 90%
Category: Radiative decays
Note: 0.5 GeV $<$ ${\mathit m}_{{{\mathit X}}}<$ 9.0 GeV, where ${\mathit m}_{{{\mathit X}}}$ is the invariant mass of the hadronic final state.
The following data is related to the above value:
$\Gamma($ ${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit A}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit g}}{{\mathit g}})/\Gamma_{\text{total}}$
$\Gamma_{125}/\Gamma$