CERN Accelerating science

 
Examples of leading-order Feynman diagrams for VBF WH production, where the Higgs boson interacts with either a W or Z~boson. These diagrams interfere destructively if the Higgs boson couplings to W and Z have the same sign, and constructively if they have opposite sign.
Examples of leading-order Feynman diagrams for VBF WH production, where the Higgs boson interacts with either a W or Z~boson. These diagrams interfere destructively if the Higgs boson couplings to W and Z have the same sign, and constructively if they have opposite sign.
Fit results in the (κZ, κW) plane, using the negative-\lam{} analysis. The results are overlaid with the confidence regions (shown in blue) from a separate fit using a combination of the Higgs boson measurements collected in Ref.~\cite{HIGG-2021-23}. This fit assumes that all Higgs boson couplings besides the ones represented are positive, and that only SM particles contribute to loop processes. Confidence regions are constructed from the log-likelihood ratio ΛLR=2ln(L/Lmax), where Lmax is the likelihood for the best-fit point, which is shown as a black dot for the VBF WH analysis or a blue dot for the Higgs combination. The 1σ, 2σ, and 5σ regions are defined by ΛLR values smaller than 2.30, 6.18, and 28.7, respectively. The SM value is marked with a star, while green triangles mark the points with κZ=±1, κW=1.