100 research outputs found

    Observation of WWő≥\gamma production and search for Hő≥\gamma production in proton-proton collisions at s\sqrt{s} = 13 TeV

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    The observation of WWő≥\gamma production in proton-proton collisions at a center-of-mass energy of 13 TeV with an integrated luminosity of 138 fb‚ąí1^{-1} is presented. The observed (expected) significance is 5.6 (4.7) standard deviations. Events are selected by requiring exactly two leptons (one electron and one muon) of opposite charge, moderate missing transverse momentum, and a photon. The measured fiducial cross section for WWő≥\gamma is 6.0 ¬Ī\pm 0.8 (stat) ¬Ī\pm 0.7 (syst) ¬Ī\pm 0.6 (modeling) fb, in agreement with the next-to-leading order quantum chromodynamics prediction. The analysis is extended with a search for the associated production of the Higgs boson and a photon, which is generated by a coupling of the Higgs boson to light quarks. The result is used to constrain the Higgs boson couplings to light quarks

    Observation of four top quark production in proton-proton collisions at s\sqrt{s} = 13 TeV