ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in tt¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ t\overline{t} $$\end{document} production

被引：0

作者：

Afiq Anuar ^{[1
]}

Anke Biekötter ^{[2
]}

Thomas Biekötter ^{[3
]}

Alexander Grohsjean ^{[5
]}

Sven Heinemeyer ^{[4
]}

Laurids Jeppe ^{[5
]}

Christian Schwanenberger ^{[1
]}

Georg Weiglein ^{[1
]}

机构：

[1] Deutsches Elektronen-Synchrotron DESY,

[2] PRISMA+ Cluster of Excellence & Institute of Physics (THEP) & Mainz Institute for Theoretical Physics,undefined

[3] Johannes Gutenberg University,undefined

[4] Institute for Theoretical Physics,undefined

[5] Karlsruhe Institute of Technology,undefined

[6] Institut für Experimentalphysik,undefined

[7] Universität Hamburg,undefined

[8] Instituto de Física Teórica (UAM/CSIC),undefined

[9] II. Institut für Theoretische Physik,undefined

[10] Universität Hamburg,undefined

来源：

Journal of High Energy Physics | / 2024卷 / 12期

关键词：

Axions and ALPs; Multi-Higgs Models; Specific BSM Phenomenology; Top Quark;

D O I：

10.1007/JHEP12(2024)197

中图分类号：

学科分类号：

摘要：

We present an analysis of the sensitivity of current and future LHC searches for new spin-0 particles in top–anti-top-quark tt¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \left(t\overline{t}\right) $$\end{document} final states, focusing on generic axion-like particles (ALPs) that are coupled to top quarks and gluons. As a first step, we derive new limits on the effective ALP Lagrangian in terms of the Wilson coefficients ct and cG~\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {c}_{\overset{\sim }{G}} $$\end{document} based on the results of the CMS search using 35.9 fb−1 of data, collected at s\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \sqrt{s} $$\end{document} = 13 TeV. We then investigate how the production of an ALP with generic couplings to gluons and top quarks can be distinguished from the production of a pseudoscalar which couples to gluons exclusively via a top-quark loop. To this end, we make use of the invariant tt¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ t\overline{t} $$\end{document} mass distribution and angular correlations that are sensitive to the tt¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ t\overline{t} $$\end{document} spin correlation. Using a mass of 400 GeV as an example, we find that already the data collected during Run 2 and Run 3 of the LHC provides an interesting sensitivity to the underlying nature of a possible new particle. We also analyze the prospects for data anticipated to be collected during the high-luminosity phase of the LHC. Finally, we compare the limits obtained from the tt¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ t\overline{t} $$\end{document} searches to existing experimental bounds from LHC searches for narrow di-photon resonances, from measurements of the production of four top quarks, and from global analyses of ALP–SMEFT interference effects.

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