![]() ![]() ![]() Since the discovery of the Higgs boson, research teams worldwide have been trying to better understand this unique particle's properties and characteristics. The Higgs boson, the fundamental subatomic particle associated with the Higgs field, was first discovered in 2012 as part of the ATLAS and CMS experiments, both of which analyze data collected at CERN's Large Hadron Collider (LHC), the most powerful particle accelerator in existence. The exclusion of the no off-shell hypothesis is consistent with 3.6 s.d. The integrated luminosity reaches up to 140 fb−1 as on-shell 4ℓ events are included in performing these scans. 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). Right: observed (solid) and expected (dashed) one-parameter likelihood scans over ΓH. The integrated luminosity reaches only up to 138 fb−1 as on-shell 4ℓ events are not included in performing this scan. The cross marks the minimum, and the blue diamond marks the SM expectation. Left: two-parameter likelihood scan of the off-shell gg and EW production signal strength parameters, □off-shellF and □off-shellV, respectively. ![]()
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