${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit D}_{{{s}}}^{-}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$ + c.c.  Decay Mode Summary INSPIRE   PDGID:
M070.220
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{366}$ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit D}_{{{s}}}^{-}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$ + c.c. $<1.3 \times 10^{-6}$ CL= 90% 923
Category: Weak decays
The following data is related to the above value:
$\Gamma($ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit D}_{{{s}}}^{-}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$ + c.c.$)/\Gamma_{\text{total}}$
$\Gamma_{366}/\Gamma$