Constraints on anomalous Higgs boson couplings to vector bosons and fermions in its production and decay using the four-lepton final state
(2021) Physical review D — Vol. 104 (2021)
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- Studies of <math display="inline"><mi>C</mi><mi>P</mi></math> 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 <math display="inline"><mn>137</mn><mtext> </mtext><mtext> </mtext><msup><mi>fb</mi><mrow><mo>-</mo><mn>1</mn></mrow></msup></math> at a proton-proton collision energy of 13 TeV. The kinematic effects in the Higgs boson’s four-lepton decay <math display="inline"><mrow><mi>H</mi></mrow><mo stretchy="false">→</mo><mn>4</mn><mo>ℓ</mo></math> 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 (<math display="inline"><mrow><mi>H</mi></mrow><mrow><mi>V</mi></mrow><mrow><mi>V</mi></mrow></math>), two couplings to gluons (<math display="inline"><mrow><mi>H</mi></mrow><mrow><mi>g</mi></mrow><mrow><mi>g</mi></mrow></math>), and two couplings to top quarks (<math display="inline"><mrow><mi>H</mi></mrow><mrow><mi>t</mi></mrow><mrow><mi>t</mi></mrow></math>). The <math display="inline"><mi>C</mi><mi>P</mi></math> measurement in the <math display="inline"><mrow><mi>H</mi></mrow><mrow><mi>t</mi></mrow><mrow><mi>t</mi></mrow></math> interaction is combined with the recent measurement in the <math display="inline"><mrow><mi>H</mi></mrow><mo stretchy="false">→</mo><mi>γ</mi><mi>γ</mi></math> 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 <math display="inline"><mi>C</mi><mi>P</mi></math> properties of the <math display="inline"><mrow><mi>H</mi></mrow><mrow><mi>t</mi></mrow><mrow><mi>t</mi></mrow></math> and effective <math display="inline"><mrow><mi>H</mi></mrow><mrow><mi>g</mi></mrow><mrow><mi>g</mi></mrow></math> couplings from a simultaneous analysis of the gluon fusion and top-associated processes. The results are consistent with the standard model of particle physics.
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Bethani, A., Bruno, G., Bury, F., Caputo, C., David, P., Delaere, C., Donertas, I. S., Giammanco, A., Jaffel, K., Lemaitre, V., Mondal, K., Prisciandaro, J., Taliercio, A., Teklishyn, M., Vischia, P., Wertz, S., Wuyckens, S., & et al. (2021). Constraints on anomalous Higgs boson couplings to vector bosons and fermions in its production and decay using the four-lepton final state. Physical review D, 104. https://doi.org/10.1103/PhysRevD.104.052004 (Original work published 2021)