Experiment	Measurement	Reference
LHCb	\([0.90 \pm 0.09\mbox{ (stat)} ^{+0.06}_{-0.02}\mbox{ (syst)}]\)	Nucl.Phys. B 867 (2013) 547-566
Average	\(\mathbf{[0.90 ^{+0.11}_{-0.09}\mbox{ (combined)}]}\)