Top observables as precise probes of the ALP

2024/12/09 by Phan, Anh Vu
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2412.06506

Abstract

Measurements of the top quark by the ATLAS and CMS experiments go beyond testing the Standard Model (SM) with high precision. Axion-like particles (ALPs), a potential SM extension involving new pseudoscalar particles, exhibit strong interactions with heavy SM fermions. Consequently, they can significantly affect the kinematic distributions of top quarks in top-antitop pair production. Moreover, such strong interactions can induce other ALP couplings at low energies, leading to a rich phenomenology. We summarize recent developments in probing the ALP-top coupling and use LHC data from run 2 to constrain the ALP parameter space.

Related

• Probing the coupling of axions to tops and gluons with LHC measurements
• Analysis of axion-like particles in a top-quark pair production at the CLIC
• Top-philic ALP phenomenology at the LHC: the elusive mass-window
• The LHC as an Axion-Photon Collider
• Detecting the coupling of axion-like particles with fermions at the ILC