Experiment	Measurement	Reference
LHCb	\([3.3 \pm 1.1\mbox{ (stat)} \pm 0.4\mbox{ (syst)}] \times 10^{-2}\)	PLB 698 (2011) 14
Average	\(\mathbf{[3.3 \pm 1.2\mbox{ (combined)}] \times 10^{-2}}\)