Extended Data Fig. 8: Log-likelihood scans of the off-shell signal strengths, ΓH, and fai.
From: Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production
Top panels: The likelihood scans are shown for \({\mu }_{{{{{{\rm{F}}}}}}}^{{{{{{\rm{off}}}}{\mbox{-}}{{{\rm{shell}}}}}}}\) or \({\mu }_{{{{{{\rm{V}}}}}}}^{{{{{{\rm{off}}}}{\mbox{-}}{{{\rm{shell}}}}}}}\) (left), \({\mu}^{{\rm{off}}{\mbox{-}}{\rm{shell}}}\) (middle), and ΓH (right). Scans for \({\mu }_{{{{{{\rm{F}}}}}}}^{{{{{{\rm{off}}}}{\mbox{-}}{{{\rm{shell}}}}}}}\) (blue) and \({\mu }_{{{{{{\rm{V}}}}}}}^{{{{{{\rm{off}}}}{\mbox{-}}{{{\rm{shell}}}}}}}\) (magenta) are obtained with the other parameter unconstrained. Those for \({\mu}^{{\rm{off}}{\mbox{-}}{\rm{shell}}}\) are shown with (blue) and without (magenta) the constraint \({R}_{{{{{{\rm{V}}}}}},{{{{{\rm{F}}}}}}}^{{{{{{\rm{off}}}}{\mbox{-}}{{{\rm{shell}}}}}}}(={\mu }_{{{{{{\rm{V}}}}}}}^{{{{{{\rm{off}}}}{\mbox{-}}{{{\rm{shell}}}}}}}/{\mu }_{{{{{{\rm{F}}}}}}}^{{{{{{\rm{off}}}}{\mbox{-}}{{{\rm{shell}}}}}}})=1\). Constraints on ΓH are shown with and without anomalous HVV couplings. Bottom panels: The likelihood scans of the anomalous HVV coupling parameters fa2 (left), fa3 (middle), and fΛ1 (right) are shown with the constraint \({{{\Gamma }}}_{{{{{{\rm{H}}}}}}}={\Gamma }_{{{{{{\rm{H}}}}}}}^{{{{{{\rm{SM}}}}}}}=4.1\,{{{{{\rm{MeV}}}}}}\) (blue), ΓH unconstrained (magenta), or based on on-shell 4ℓ data only (green). Observed (expected) scans are shown with solid (dashed) curves. The horizontal lines indicate the 68% \((-2{{\Delta }}\ln {{{{{\mathcal{L}}}}}}=1.0)\) and 95% \((-2{{\Delta }}\ln {{{{{\mathcal{L}}}}}}=3.84)\) CL regions. The integrated luminosity reaches up to 138 fb−1 when only off-shell information is used, and up to 140 fb−1 when on-shell 4ℓ events are included.
