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Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to PLB. The superseded preliminary plots can be found here.

CMS Publications