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Measurements of W + W + ≥ 1 jet production cross-sections in pp collisions at √s = 13 TeV with the ATLAS detector

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Fiducial and differential measurements of W+W production in events with at least one hadronic jet are presented. These cross-section measurements are sensitive to the properties of electroweak-boson self-interactions and provide a test of perturbative quantum chromodynamics and the electroweak theory. The analysis is performed using protonproton collision data collected at s=13 TeV with the ATLAS experiment, corresponding to an integrated luminosity of 139 fb−1. Events are selected with exactly one oppositely charged electronmuon pair and at least one hadronic jet with a transverse momentum of pT>30 GeV and a pseudorapidity of |η|<4.5. After subtracting the background contributions and correcting for detector effects, the jet-inclusive W+W−+≥1 jet fiducial cross-section and W+W−+ jets differential cross-sections with respect to several kinematic variables are measured, thus probing a previously unexplored event topology at the LHC. These measurements include leptonic quantities, such as the lepton transverse momenta and the transverse mass of the W+W system, as well as jet-related observables such as the leading jet transverse momentum and the jet multiplicity. Limits on anomalous triple-gauge-boson couplings are obtained in a phase space where interference between the Standard Model amplitude and the anomalous amplitude is enhanced.



Hadron-Hadron scattering (experiments)

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Journal of High Energy Physics

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Springer Science and Business Media LLC