Probing New Physics by the Tail of the Off-shell Higgs in $V_L{V}_L$ Mode

Abstract

Off-shell Higgs at the high mass tail may shed light on the underlying mechanism of the electroweak symmetry breaking. Due to the large cancellation in the standard model (SM) between the box and Higgs-mediated triangle diagrams, the $gg\to WW(ZZ)$ process in the SM is dominated by the $V_T{V}_T$ transverse-mode at the high mass tail. The cancellation does not necessarily hold, when there is a sufficiently large new physics contribution resulting in $V_L{V}_L$ longitudinal mode, which is commonly the case when the Higgs sector is modified. Thus the $V_L{V}_L$ final states in the high mass tail can be utilized as a sensitive probe for such models. In the paper we focus on a study of the $gg\to ZZ$ process in the fully leptonic decay modes, proposing to utilize the polarization modes of the off-shell Higgs to probe new physics, whose contribution mainly shows in the longitudinal mode. As examples, we analyze three different Higgs sector new physics cases (Higgs portal with a light scalar, a broad-width scalar that mixes with the Higgs, and quantum critical Higgs models), and demonstrate that the angular information relating to the polarization serves as very sensitive probe for such new physics.

arXiv comment6 pages, 2 figures, 1 table

References in corpus (30)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• Causality, Analyticity and an IR Obstruction to UV Completion
• ZZ production at hadron colliders in NNLO QCD
• Inadequacy of zero-width approximation for a light Higgs boson signal
• Testing Electroweak Baryogenesis with Future Colliders
• Constraining the Higgs boson width with ZZ production at the LHC
• Phenomenology of a 750 GeV Singlet
• Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs
• QCD corrections to ZZ production in gluon fusion at the LHC
• Precision Higgs Physics at CEPC
• Softness and Amplitudes' Positivity for Spinning Particles
• Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Electroweak Breaking on a Soft Wall
• Search for heavy $ZZ$ resonances in the ${\ell }^{+}{\ell }^{-}{\ell }^{+}{\ell }^{-}$ and ${\ell }^{+}{\ell }^{-}\nu \bar{\nu }$ final states using proton proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Taming the off-shell Higgs boson
• Constraints on off-shell Higgs boson production and the Higgs boson total width in $ZZ\to 4\ell$ and $ZZ\to 2\ell 2\nu$ final states with the ATLAS detector
• ZZ and Zgamma still haven't found what they are looking for
• New Physics Signals in Longitudinal Gauge Boson Scattering at the LHC
• Precision studies of the Higgs boson decay channel H -> ZZ -> 4l with MEKD
• Holographic Unhiggs
• The Unhiggs
• Off-shell Higgs Probe to Naturalness
• Higgs Couplings at High Scales
• Continuum Naturalness
• The Quantum Critical Higgs
• Confronting the fourth generation two Higgs doublet model with the phenomenology of heavy Higgs bosons
• Measurements of the 125 GeV Higgs boson at CMS

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• Probing $Zt\bar{t}$ couplings using $Z$ boson polarization in $ZZ$ production at hadron colliders
• Polarization fraction measurement in ZZ scattering using deep learning
• Discriminating between Higgs Production Mechanisms via Jet Charge at the LHC
• Suppression of Higgs Mixing by Quantum Zeno Effect
• Polarized and unpolarized off-shell $H^{\ast }\to ZZ\to 4\ell$ decay above the $2m_Z$ threshold
• On Broad Kaluza-Klein Gluons
• Longitudinally polarized ZZ scattering at the Muon Collider
• Quantum Critical Higgs: From AdS${}_5$ to Colliders
• Sensitivity to longitudinal vector boson scattering and doubly-charged Higgs boson production in ${\mathbf{W}}^{\pm }{\mathbf{W}}^{\pm }\mathbf{jj}$ at future hadron colliders