${{\mathit \Upsilon}_{{{2}}}{(1D)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$  Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
M177.1
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{1}$ ${{\mathit \Upsilon}_{{{2}}}{(1D)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$ seen 679
The following data is related to the above value:
 ▸ expand all datablocks
$\Gamma({{\mathit \Upsilon}_{{{2}}}{(1D)}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \Upsilon}{(1S)}})/\Gamma({{\mathit \Upsilon}_{{{2}}}{(1D)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}})$
$\Gamma_{4}/\Gamma_{1}$
$\Gamma({{\mathit \Upsilon}_{{{2}}}{(1D)}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \Upsilon}{(1S)}})/\Gamma({{\mathit \Upsilon}_{{{2}}}{(1D)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}})$
$\Gamma_{3}/\Gamma_{1}$