${{\mathit \Upsilon}_{{2}}{(1D)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$   Decay Mode Summary INSPIRE   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:
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$\Gamma($ ${{\mathit \Upsilon}_{{2}}{(1D)}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \Upsilon}{(1S)}}$ $)/\Gamma($ ${{\mathit \Upsilon}_{{2}}{(1D)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$ $)$
$\Gamma_{4}/\Gamma_{1}$
$\Gamma($ ${{\mathit \Upsilon}_{{2}}{(1D)}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \Upsilon}{(1S)}}$ $)/\Gamma($ ${{\mathit \Upsilon}_{{2}}{(1D)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$ $)$
$\Gamma_{3}/\Gamma_{1}$