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High Energy Physics - Phenomenology

arXiv:2303.17634 (hep-ph)
[Submitted on 30 Mar 2023 (v1), last revised 10 Oct 2023 (this version, v3)]

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

Authors:Fabian Esser, Maeve Madigan, Veronica Sanz, Maria Ubiali
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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.
Comments: 41 pages, 18 figures
Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Experiment (hep-ex)
Cite as: arXiv:2303.17634 [hep-ph]
  (or arXiv:2303.17634v3 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.2303.17634
Journal reference: JHEP09(2023)063

Submission history

From: Fabian Esser [view email]
[v1] Thu, 30 Mar 2023 18:00:31 UTC (1,389 KB)
[v2] Wed, 6 Sep 2023 12:50:44 UTC (1,716 KB)
[v3] Tue, 10 Oct 2023 16:08:51 UTC (1,716 KB)
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