Fig. 4: Log-likelihood scans of \({\mu }_{{{{{{\rm{F}}}}}}}^{{{{{{\rm{off}}}}{\mbox{-}}{{{\rm{shell}}}}}}}\) and \({\mu }_{{{{{{\rm{V}}}}}}}^{{{{{{\rm{off}}}}{\mbox{-}}{{{\rm{shell}}}}}}}\), and ΓH.
From: Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production
Left: two-parameter likelihood scan of the off-shell gg and EW production signal strength parameters, \({\mu }_{{{{{{\rm{F}}}}}}}^{{{{{{\rm{off}}}}{\mbox{-}}{{{\rm{shell}}}}}}}\) and \({\mu }_{{{{{{\rm{V}}}}}}}^{{{{{{\rm{off}}}}{\mbox{-}}{{{\rm{shell}}}}}}}\), respectively. The dot-dashed and dashed contours enclose the 68% \(({-2}{{\Delta }}\ln {{{{L}}}}={2.30})\) and 95% \(({-2}{{\Delta }}\ln {{{{L}}}}={5.99})\) CL regions. The cross marks the minimum, and the blue diamond marks the SM expectation. The integrated luminosity reaches only up to 138 fb−1 as on-shell 4ℓ events are not included in performing this scan. Right: observed (solid) and expected (dashed) one-parameter likelihood scans over ΓH. Scans are shown for the combination of 4ℓ on-shell data with 4ℓ off-shell (magenta) or 2ℓ2ν off-shell data (green) alone, or with both datasets (black). The horizontal lines indicate the 68% \(({-2}{{\Delta }}\ln {{{{L}}}}={1.0})\) and 95% \(({-2}{{\Delta }}\ln {{{{L}}}}={3.84})\) CL regions. The integrated luminosity reaches up to 140 fb−1 as on-shell 4ℓ events are included in performing these scans. The exclusion of the no off-shell hypothesis is consistent with 3.6 s.d. in both panels.
