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On the coupling of axion-like particles to the top quark

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arxiv 2303.17634 v3 pith:DGM3A75C submitted 2023-03-30 hep-ph hep-ex

Fabian Esser , Maeve Madigan , Veronica Sanz , Maria Ubiali This is my paper
classification hep-phhep-ex
keywords couplingaxion-likebestloop-inducedprobeassociatedchannelcompare
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

In this paper we explore the coupling of a light axion-like particle (ALP) to top quarks. We use high-energy LHC probes, and examine both the direct probe to this coupling in associated production of a top-pair with an ALP, and the indirect probe through loop-induced gluon fusion to an ALP leading to top pairs. Using the latest LHC Run II data, we provide the best limit on this coupling. We also compare these limits with those obtained from loop-induced couplings in diboson final states, finding that the $t\bar t$+MET channel is the best current handle on this coupling.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. ALP pair production at the LHC

    hep-ph 2026-07 conditional novelty 6.0 of 10

    Non-resonant gg→aa→4γ production could constrain the dimension-6 ALP-gluon coupling down to ~10^-3 TeV^-2 at 300 fb^-1, but the allowed parameter space remains unbounded along multiple flat directions.

  2. Constraining ALP-Top Interaction from the Chromoelectric Dipole Moment of the Top Quark

    hep-ph 2025-07 conditional novelty 6.0 of 10

    The paper derives the one- and two-loop top quark CEDM induced by a CP-violating ALP at q^2 = m_t^2 and uses it to set new bounds on the ALP-top coupling, with the neutron EDM giving the strongest of the three new limits.

  3. A search for heavy axion-like particles in light-by-light scattering at the FCC-hh

    hep-ph 2026-03 unverdicted novelty 3.0 of 10

    Computes production cross sections and sensitivity limits for heavy ALPs in light-by-light scattering at FCC-hh across pp, pPb, and PbPb modes.

  4. Axions and Axion-like particles: collider searches

    hep-ph 2025-08 accept

    A pedagogical review of the ALP effective field theory, production and decay at colliders, indirect search strategies, and a summary of current bounds on the ALP-photon coupling.

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