${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$   Decay Mode Summary INSPIRE   PDGID:
M070.80
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{358}$ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ $<2.7 \times 10^{-7}$ CL= 90% 1548
Category: Charge conjugation ($\mathit C$), Parity ($\mathit P$), Lepton Family number ($\mathit LF$) violating modes
Note: (C) CHARGE CONJUGATION ($\mathit C$) INVARIANCE
The following data is related to the above value:
 ▸ expand all datablocks
$\Gamma($ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ $)$
$\Gamma_{358}$
$\Gamma($ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{358}/\Gamma$
$\Gamma($ ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ $)/\Gamma_{\text{total}}{\times }$ $\Gamma($ ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit K}^{+}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{358}/\Gamma{\times }\Gamma^{{{\mathit B}^{\pm}}}_{283}/\Gamma^{{{\mathit B}^{\pm}}}$