A global analysis of axion-like particle interactions using SMEFT fits

Abstract

In the presence of an axion or axion-like particle (ALP) that couples to the Standard Model via dimension-five interactions, dimension-six SMEFT interactions are generated via renormalization-group evolution. As many of these SMEFT contributions are experimentally tightly constrained, this "ALP-SMEFT interference" can be used to derive indirect bounds on the ALP couplings to the Standard Model particles. We present a global analysis of the Wilson coefficients of the ALP effective Lagrangian based on Higgs, top, and low-energy data. The obtained bounds are model independent and are competitive or even stronger than direct bounds in the GeV to TeV ALP-mass range.

arXiv comment18 pages, 5 figures; v2: updated to published version, fixed mistake in DFSZ model in Section 4.2

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• Top Secrets: Long-Lived ALPs in Top Production
• ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in $t\bar{t}$ production
• Constraining the Higgs Potential with Neural Simulation-based Inference for Di-Higgs Production
• Axion-Like Particles at future $e^{-}p$ collider
• QCD Axion Strings or Seeds?
• Staying on Top of SMEFT-Likelihood Analyses
• Prospects for sub-EW-scale ALP searches via $\gamma +b\bar{b}$ signatures at the LHC using jet substructure techniques
• Top observables as precise probes of the ALP