Journal Article

PUBDB-2025-00390

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in $ t\overline{t} $ production

Anuar, A.Extern*DESY* ; Biekötter, A. ; Biekötter, T.DESY* ; Grohsjean, A.Extern* ; Heinemeyer, S. ; Jeppe, L.DESY* ; Schwanenberger, C. (Corresponding author)DESY* ; Weiglein, G. (Corresponding author)DESY*

2024
Springer Heidelberg

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Please use a persistent id in citations: doi:10.1007/JHEP12(2024)197  doi:10.3204/PUBDB-2025-00390

Report No.: DESY-24-059; IFT--UAM/CSIC-24-042; arXiv:2404.19014

Abstract: We present an analysis of the sensitivity of current and future LHC searches for new spin-0 particles in top–anti-top-quark $ \left(t\overline{t}\right) $ 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 c$_{t}$ and $ {c}_{\overset{\sim }{G}} $ based on the results of the CMS search using 35.9 fb$^{−1}$ of data, collected at $ \sqrt{s} $ = 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 $ t\overline{t} $ mass distribution and angular correlations that are sensitive to the $ t\overline{t} $ 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 $ t\overline{t} $ 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.

Keyword(s): top: pair production ; spin: correlation ; interference: effect ; interpretation of experiments: CERN LHC Coll ; gluon ; axion-like particles ; sensitivity ; two-photon ; interpretation of experiments: CMS ; angular correlation ; new particle ; pseudoscalar ; mass spectrum ; dip ; TeV ; Axions and ALPs ; Multi-Higgs Models ; Specific BSM Phenomenology ; Top Quark

Note: JHEP 2024, 197 (2024). 28 pages, 9 figures

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Contributing Institute(s):

1. Theorie-Gruppe (T)
2. LHC/CMS Experiment (CMS)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)390831469 - EXC 2118: Precision Physics, Fundamental Interactions and Structure of Matter (PRISMA+) (390831469) (390831469)
3. DFG project G:(GEPRIS)390833306 - EXC 2121: Quantum Universe (390833306) (390833306)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2024

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Database coverage:
; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; National-Konsortium ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Anuar, A.Extern*DESY* ; Biekötter, A. ; Biekötter, T.DESY* ; Grohsjean, A.Extern* ; Heinemeyer, S. ; Jeppe, L.DESY* ; Schwanenberger, C.DESY* ; Weiglein, G. (Corresponding author)DESY*
ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in $t \bar{t}$ production
[10.3204/PUBDB-2024-01594]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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