Probing the electroweak symmetry breaking with Higgs production at the LHC

Abstract

The electroweak symmetry breaking (EWSB) mechanism is still an undecided question in particle physics. We propose to utilize the single top quark and Higgs associated production ($th$), $Zh$ production via gluon fusion at the LHC to probe the couplings between the Higgs and the gauge bosons and further to test the EWSB. We demonstrate that the $th$ and $gg\to Zh$ productions are sensitive to the relative sign of couplings ($ht\bar{t}$, $hWW$) and ($ht\bar{t}$, $hZZ$), respectively. We find that the relative sign between $hWW$ and $hZZ$ couplings could be fully determined after combining the present measurements from $gg\to h$, $t\bar{t}h$ and the $th$, $Zh$ channels, as well as $tZj$ and $Zt\bar{t}$ production at the 13 TeV LHC, and this conclusion is not sensitive to the possible new physics contribution induced by $Zt\bar{t}$ couplings in the $gg\to Zh$ production.

5 pages, 7 figures, published version

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Cited by in corpus (8)

• ZH production in gluon fusion at NLO in QCD
• Anomalous couplings in associated $VH$ production with Higgs decay to massive $b$ quarks at NNLO in QCD
• Discriminating between Higgs Production Mechanisms via Jet Charge at the LHC
• Probing composite Higgs boson substructure at the HL-LHC
• Determining Higgs boson width at electron-positron colliders
• Status of negative coupling modifiers for extended Higgs sectors
• Higgs couplings in SMEFT via Zh production at the HL-LHC
• Optimal estimation of Higgs-Gauge Boson couplings at the future $e^{+}{e}^{-}$ colliders