ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in t t ¯ $$ t\overline{t} $$ production
Abstract We present an analysis of the sensitivity of current and future LHC searches for new spin-0 particles in top–anti-top-quark t t ¯ $$ \left(t\overline{t}\right) $$ final states, focusing on generic axion-like particles (ALPs) that are coupled to top quarks and gluons. As a first step, we der...
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2024-12-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP12(2024)197 |
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| author | Afiq Anuar Anke Biekötter Thomas Biekötter Alexander Grohsjean Sven Heinemeyer Laurids Jeppe Christian Schwanenberger Georg Weiglein |
| author_facet | Afiq Anuar Anke Biekötter Thomas Biekötter Alexander Grohsjean Sven Heinemeyer Laurids Jeppe Christian Schwanenberger Georg Weiglein |
| author_sort | Afiq Anuar |
| collection | DOAJ |
| description | Abstract We present an analysis of the sensitivity of current and future LHC searches for new spin-0 particles in top–anti-top-quark t t ¯ $$ \left(t\overline{t}\right) $$ 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 G ~ $$ {c}_{\overset{\sim }{G}} $$ based on the results of the CMS search using 35.9 fb −1 of data, collected at s $$ \sqrt{s} $$ = 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 t ¯ $$ t\overline{t} $$ mass distribution and angular correlations that are sensitive to the t t ¯ $$ t\overline{t} $$ 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 t ¯ $$ t\overline{t} $$ 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. |
| format | Article |
| id | doaj-art-d6b7cf58f28b4ad6b8f0e2031d1db144 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-d6b7cf58f28b4ad6b8f0e2031d1db1442025-01-12T12:05:47ZengSpringerOpenJournal of High Energy Physics1029-84792024-12-0120241213910.1007/JHEP12(2024)197ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in t t ¯ $$ t\overline{t} $$ productionAfiq Anuar0Anke Biekötter1Thomas Biekötter2Alexander Grohsjean3Sven Heinemeyer4Laurids Jeppe5Christian Schwanenberger6Georg Weiglein7Deutsches Elektronen-Synchrotron DESYPRISMA+ Cluster of Excellence & Institute of Physics (THEP) & Mainz Institute for Theoretical Physics, Johannes Gutenberg UniversityInstitute for Theoretical Physics, Karlsruhe Institute of TechnologyInstitut für Experimentalphysik, Universität HamburgInstituto de Física Teórica (UAM/CSIC)Deutsches Elektronen-Synchrotron DESYDeutsches Elektronen-Synchrotron DESYDeutsches Elektronen-Synchrotron DESYAbstract We present an analysis of the sensitivity of current and future LHC searches for new spin-0 particles in top–anti-top-quark t t ¯ $$ \left(t\overline{t}\right) $$ 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 G ~ $$ {c}_{\overset{\sim }{G}} $$ based on the results of the CMS search using 35.9 fb −1 of data, collected at s $$ \sqrt{s} $$ = 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 t ¯ $$ t\overline{t} $$ mass distribution and angular correlations that are sensitive to the t t ¯ $$ t\overline{t} $$ 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 t ¯ $$ t\overline{t} $$ 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.https://doi.org/10.1007/JHEP12(2024)197Axions and ALPsMulti-Higgs ModelsSpecific BSM PhenomenologyTop Quark |
| spellingShingle | Afiq Anuar Anke Biekötter Thomas Biekötter Alexander Grohsjean Sven Heinemeyer Laurids Jeppe Christian Schwanenberger Georg Weiglein ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in t t ¯ $$ t\overline{t} $$ production Journal of High Energy Physics Axions and ALPs Multi-Higgs Models Specific BSM Phenomenology Top Quark |
| title | ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in t t ¯ $$ t\overline{t} $$ production |
| title_full | ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in t t ¯ $$ t\overline{t} $$ production |
| title_fullStr | ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in t t ¯ $$ t\overline{t} $$ production |
| title_full_unstemmed | ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in t t ¯ $$ t\overline{t} $$ production |
| title_short | ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in t t ¯ $$ t\overline{t} $$ production |
| title_sort | alp ine quests at the lhc hunting axion like particles via peaks and dips in t t ¯ t overline t production |
| topic | Axions and ALPs Multi-Higgs Models Specific BSM Phenomenology Top Quark |
| url | https://doi.org/10.1007/JHEP12(2024)197 |
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