CMS-PAS-HIG-23-007

CMS-PAS-HIG-23-007
Search for anomalous Higgs boson couplings in WH $\to\ell\nu\mathrm{b\bar{b}}$ production through Vector Boson Scattering
CMS Collaboration
30 November 2023

Abstract: A study of the electroweak-induced production of a W boson and a Higgs boson is presented. The data collected by the CMS experiment in 2016-2018 from proton-proton collisions at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 138 fb $^{-1}$ . Selected events target the leptonic decay of the W boson and the decay of the Higgs boson to $\mathrm{b\bar{b}}$ . In particular, beyond standard model (BSM) Higgs couplings are considered, such that the Higgs boson decay products are boosted and thus reconstructed as a single large-cone jet. Limits are set on the parameters that scale the Higgs couplings to the W and Z bosons in the $\kappa$ framework. The BSM scenario where $\lambda_{\mathrm{WZ}} = \kappa_\mathrm{W}/\kappa_\mathrm{Z} = -$ 1 is excluded at a confidence level (CL) larger than 99.99%, with an expected and observed significance beyond 5 $\sigma$ . The hypotheses where the $\kappa_\mathrm{W}$ and $\kappa_\mathrm{Z}$ parameters are compatible with the current measurements and have different signs are similarly excluded at a CL larger than 99.99%.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to PLB. The superseded preliminary plots can be found here.

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