PRL 111, 181801 (2013)

Parameter	Measurement
\( \frac{ \sigma(B_c^+)}{ \sigma(B_s^0)} \times {\cal B} ( B_c^+ \to B_s^0\pi^+ ) \)	\([2.37 \pm 0.31\mbox{ (stat)} \pm 0.11\mbox{ (syst)} ^{+0.17}_{-0.13}\mbox{ (Bc lifetime)}] \times 10^{-3}\)