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arXiv · 1411.2210

Probing anomalous Higgs couplings in $H \to Z V$ decays

Tanmoy Modak·Rahul Srivastava
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Abstract

We analyze the possibility of probing anomalous Higgs couplings in the rare decays $H \to Z V$, $V$ 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 $H \to Z V$ 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.

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Tanmoy Modak, Rahul Srivastava. 2017-01-22. Probing anomalous Higgs couplings in $H \to Z V$ decays. https://doi.org/10.1142/s0217732317500043

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