Experiment	Measurement	Reference
ATLAS	\([2.8 ^{+1.2}_{-0.8}\mbox{ (stat)} \pm 0.3\mbox{ (syst)}]\)	EPJC 76, 1 (2016)
Average	\(\mathbf{[2.8 ^{+1.2}_{-0.9}\mbox{ (combined)}]}\)