Experiment	Measurement	Reference
LHCb	\([0.89 \pm 0.19\mbox{ (stat)} ^{+0.07}_{-0.13}\mbox{ (syst)}]\)	Nucl.Phys. B 867 (2013) 547-566
Average	\(\mathbf{[0.89 ^{+0.20}_{-0.23}\mbox{ (combined)}]}\)