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Di-Higgs production via Axion-Like Particles
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abstract
Due to the pseudo-scalar nature of the axion-like particle (ALP), the CP- conserving production of two Higgs bosons via the ALP necessarily involves an additional Z or $\gamma$ boson. We examine the existing constraints from di-Higgs searches at Run 2 of the LHC and find that, despite the presence of extra objects in the final state, these searches are sensitive to a combination of ALP couplings to gluons and three-bosons in the TeV scale range. Additionally, we propose a specialized search strategy incorporating an energetic leptonic Z boson. This refined ALP-induced production process would allow for the identification of the h h $\rightarrow$ 4 b-jet final state and could potentially probe the TeV scale using data from Run 2 of the LHC. This production process can also occur through a coupling between the top quark and the ALP. We translate the current constraints on di-Higgs production into new limits on the ALP-top coupling.
Forward citations
Cited by 2 Pith papers
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A global analysis of ALP-mediated multiboson production at the LHC
A global fit to LHC multiboson data constrains the three ALP-gauge couplings to cG below 0.41, cW below 1.09 and cB below 1.78 at 2 sigma, for fa equal to 1 TeV.
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Probing the coupling of axions to tops and gluons with LHC measurements
Using CONTUR reinterpretation of LHC data, the authors derive 2 sigma bounds on ALP-top and ALP-gluon couplings, with fa/c_t above about 200 GeV and fa/c_gluon above about 5 TeV.
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