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LHC as an Axion Factory: Probing an Axion Explanation for (g-2)_μ with Exotic Higgs Decays
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LHC as an Axion Factory: Probing an Axion Explanation for (g-2)_μ with Exotic Higgs Decays
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We argue that a large region of so far unconstrained parameter space for axion-like particles (ALPs), where their couplings to the Standard Model are of order $(0.01\!-\!1)\,\mbox{TeV}^{-1}$, can be explored by searches for the exotic Higgs decays $h\to Za$ and $h\to aa$ in Run-2 of the LHC. Almost the complete region in which ALPs can explain the anomalous magnetic moment of the muon can be probed by searches for these decays with subsequent decay $a\to\gamma\gamma$, even if the relevant couplings are loop suppressed and the $a\to\gamma\gamma$ branching ratio is less than~1.
Forward citations
Cited by 3 Pith papers
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The KSVZ Atlas: A Unified SMEFT-ALP Framework
A matching framework from arbitrary KSVZ UV completions to SMEFT and ALP EFT yields robust operator bounds from global fits that often dominate direct ALP searches except when mass mixing occurs.
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Lepton $g-2$ non-universality of hadronic contributions and a sub-GeV window to New Physics
A rescaled difference a_μ-e of lepton g-2 values cancels short-distance effects and cuts hadronic vacuum polarization uncertainty by ~85%, offering a cleaner probe for sub-GeV new physics.
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A search for heavy axion-like particles in light-by-light scattering at the FCC-hh
Computes production cross sections and sensitivity limits for heavy ALPs in light-by-light scattering at FCC-hh across pp, pPb, and PbPb modes.
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