Experiment	Measurement	Reference
LHCb	\([7.8 \pm 0.7\mbox{ (stat)} \pm 0.3\mbox{ (syst)} \pm 0.6\mbox{ (fs/fd)}]\)	PLB 727 (2013), pp. 403-411
Average	\(\mathbf{[7.8 \pm 1.0\mbox{ (combined)}]}\)