${{\mathit B}_{{{s}}}^{0}}$ $\rightarrow$ ${{\mathit a}}{{\mathit a}}$ , ${{\mathit a}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$  Decay Mode Summary INSPIRE   PDGID:
S086.167
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{158}$ ${{\mathit B}_{{{s}}}^{0}}$ $\rightarrow$ ${{\mathit a}}{{\mathit a}}$ , ${{\mathit a}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ $<5.8 \times 10^{-10}$ CL= 95%
Category: Lepton Family number ($\mathit LF$) violating modes or $\Delta \mathit B$ = 1 weak neutral current ($\mathit B1$) modes
Note: (B1) Allowed by higher-order electroweak interactions.
The following data is related to the above value:
$\Gamma($ ${{\mathit B}_{{{s}}}^{0}}$ $\rightarrow$ ${{\mathit a}}{{\mathit a}}$ , ${{\mathit a}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}})/\Gamma_{\text{total}}$
$\Gamma_{158}/\Gamma$