Probing anomalous Higgs couplings in $H\to ZV$ decays

Abstract

We analyze the possibility of probing anomalous Higgs couplings in the rare decays $H\to ZV$, $V$ being a vector quarkonium state. These rare decays involve both gauge as well as the Yukawa sectors and either of them can potentially be anomalous. We show that the branching fractions for $H\to ZV$ decays in Standard Model are small, making it a sensitive probe for anomalous Higgs couplings originating from physics beyond Standard Model. Moreover, as both $V$ and $Z$ can decay into pair of charged leptons, they provide experimentally clean channels and future LHC runs should observe such decays. We perform a model independent analysis and show how angular asymmetries can be used to probe these anomalous Higgs couplings, taking further decays of $V$ and $Z$ to pair of charged leptons into account. The angular asymmetries can provide significant information about anomalous Higgs couplings in both gauge and Yukawa sectors.

16 pages, 8 Figures, 2 Tables, discussions and Refs. added

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• Seeking the CP-odd Higgs via $h\to {\eta }_{c,b}{\ell }^{+}{\ell }^{-}$
• Adding Pseudo-Observables to the Four-Lepton Experimentalist's Toolbox
• $J/\psi$ associated production with a bottom quark pair from the Higgs boson decay in next-to-leading order QCD
• Next-to-leading order QCD corrections to the decay of Higgs to vector meson and Z boson
• On the interference of $ggH$ and $c\bar{c}H$ Higgs production mechanisms and the determination of charm Yukawa coupling at the LHC
• Exclusive rare Higgs decays into lepton pair and light mesons
• $h\to {\rm Y}\gamma$ Decay: Smoking Gun Signature of Wrong-Sign $hb\bar{b}$ Coupling