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| CMS-PAS-SMP-22-006 | ||
| Observation of WW$ \gamma $ production and constraints on Higgs couplings to light quarks in proton-proton collisions at $ \sqrt{s}= $ 13 TeV | ||
| CMS Collaboration | ||
| 23 March 2023 | ||
| Abstract: The first observation of WW$ \gamma $ production with leptonic final states in proton-proton collisions at a center-of-mass energy of 13 TeV is presented. A data set corresponding to an integrated luminosity of 138 fb$ ^{-1} $ collected by the CMS experiment at the LHC in 2016-2018 is used. 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 WW$ \gamma $ is $ \sigma = $ 6.0 $ \pm $ 1.7 fb, in good agreement with the next-to-leading order QCD prediction. The analysis is also extended to search for the associated production of a Higgs boson and a photon where the Higgs boson decays to W$ ^{+} $W$ ^{-} $, which is sensitive to the Higgs coupling to light quarks (the c, s, u, and d quarks), and limits on these couplings are reported at 95% confidence level. | ||
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These preliminary results are superseded in this paper, Accepted by PRL. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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