Constraints on anomalous Higgs boson couplings to vector bosons and fermions in its production and decay using the four-lepton final state



Studies of CP violation and anomalous couplings of the Higgs boson to vector bosons and fermions are
presented. The data were acquired by the CMS experiment at the LHC and correspond to an integrated
luminosity of 137 fb−1 at a proton-proton collision energy of 13 TeV. The kinematic effects in the Higgs
boson’s four-lepton decay H → 4l and its production in association with two jets, a vector boson, or top
quarks are analyzed, using a full detector simulation and matrix element techniques to identify the
production mechanisms and to increase sensitivity to the tensor structure of the Higgs boson interactions.
A simultaneous measurement is performed of up to five Higgs boson couplings to electroweak vector
bosons (HVV), two couplings to gluons (Hgg), and two couplings to top quarks (Htt). The CP
measurement in the Htt interaction is combined with the recent measurement in the H → γγ channel. The
results are presented in the framework of anomalous couplings and are also interpreted in the framework of
effective field theory, including the first study of CP properties of the Htt and effective Hgg couplings from
a simultaneous analysis of the gluon fusion and top-associated processes. The results are consistent with the
standard model of particle physics.
Datum van beschikbaarheid18 okt 2021


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