Study of anomalous gauge-Higgs couplings using $Z$ boson polarization at LHC

Abstract

We estimate model-independent bounds that could be obtained on the anomalous $ZZH$ vertex using polarization parameters of the $Z$ boson produced in the Higgstrahlung process at the LHC. We calculate the eight independent polarization parameters from the spin density matrix elements of the $Z$, which can probe underlying new physics contributions to $ZH$ production. By using the approach that connects these polarization observables to the coefficients in the angular distribution of the decay products of the $Z$, we estimate the limits on the anomalous $ZZH$ coupling that can be obtained at the 14 TeV LHC.

19 pages, 2 figures. arXiv admin note: text overlap with arXiv:1904.06663

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• Parton distributions in the LHC era: MMHT 2014 PDFs
• Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state
• Constraining Higgs boson effective couplings at electron-positron colliders
• Role of polarization in probing anomalous gauge interactions of the Higgs boson
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• Use of transverse beam polarization to probe anomalous VVH interactions at a Linear Collider
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Cited by in corpus (11)

• Entanglement and Bell inequalities violation in $H\to ZZ$ with anomalous coupling
• $ZH$ production in gluon fusion: two-loop amplitudes with full top quark mass dependence
• A fully differential SMEFT analysis of the golden channel using the method of moments
• A new evaluation of the $HZZ$ coupling: direct bounds on anomalous contributions and $CP$ violating effects via a new asymmetry
• Entanglement and Bell inequality violation in vector diboson systems produced in decays of spin-0 particles
• Polarized and unpolarized off-shell $H^{\ast }\to ZZ\to 4\ell$ decay above the $2m_Z$ threshold
• $CP$ violation in the $HZZ$ vertex and left-right asymmetries
• Polarized $Z$ cross sections in Higgsstrahlung for the determination of anomalous $ZZH$ couplings
• Optimal estimation of Higgs-Gauge Boson couplings at the future $e^{+}{e}^{-}$ colliders
• Use of $Z$ polarization in $e^{+}{e}^{-}\to ZH$ to measure the triple-Higgs coupling
• Probing CP-violating Higgs-Gauge couplings with Higgsstrahlung at $e^{-}{e}^{+}$ collider