${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$   Decay Mode Summary INSPIRE   PDGID:
S042.141
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{527}$ ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ $<3.2 \times 10^{-7}$ CL= 90% 2640
Category: Lepton Family number ($\mathit LF$) or Lepton number ($\mathit L$) or Baryon number ($\mathit B$) violating modes, or/and $\Delta \mathit B$ = 1 weak neutral current ($\mathit B1$) modes
Note: (B1) Allowed by higher-order electroweak interactions.
The following data is related to the above value:
$\Gamma($ ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{527}/\Gamma$