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

被引：9
|
作者：
Esser F. [1 ]
Madigan M. [2 ,3 ]
Sanz V. [1 ,4 ]
Ubiali M. [3 ]
机构：
[1] Instituto de Física Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia
[2] Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, Heidelberg
[3] DAMTP, University of Cambridge, Wilberforce Road, Cambridge
[4] Department of Physics and Astronomy, University of Sussex, Brighton
来源：
Journal of High Energy Physics | / 2023卷 / 9期
基金：
欧洲研究理事会; 英国科学技术设施理事会; 欧盟地平线“2020”;
关键词：
Axions and ALPs; New Light Particles; Top Quark;
D O I：
10.1007/JHEP09(2023)063
中图分类号：
学科分类号：
摘要：
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 tt¯ +MET channel is the best current handle on this coupling. © 2023, The Author(s).
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