Combination of cross-section measurements for associated production of a single top-quark and a W boson at √s = 8 TeV with the ATLAS and CMS experiments

A combination of cross-section measurements for the associated production of a top quark and a W boson in proton-proton collisions at √s = 8 TeV by the ATLAS and CMS experiments is presented. The two measurements are based on integrated luminosities of 20.3 fb−1 and 12.2 fb−1, respectively. The combined production cross-section of a single top quark and a W boson is determined as 23.1 ± 1.1 (stat.) ±3.3 (syst.) ±0.8 (lumi.) pb = 23.1 ± 3.6 pb, in agreement with the NLO+NNLL expectation.