Sensitivity to CP $$ \mathcal{CP} $$ -violating effective couplings in the top-Higgs sector
Abstract The observed baryon asymmetry of the Universe requires new sources of charge-parity ( CP $$ \mathcal{CP} $$ ) violation beyond those in the Standard Model. In this work, we investigate CP $$ \mathcal{CP} $$ -violating effects in the top-Higgs sector using the Standard Model Effective Field...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-06-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP06(2025)052 |
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| author | Víctor Miralles Yvonne Peters Eleni Vryonidou Joshua K. Winter |
| author_facet | Víctor Miralles Yvonne Peters Eleni Vryonidou Joshua K. Winter |
| author_sort | Víctor Miralles |
| collection | DOAJ |
| description | Abstract The observed baryon asymmetry of the Universe requires new sources of charge-parity ( CP $$ \mathcal{CP} $$ ) violation beyond those in the Standard Model. In this work, we investigate CP $$ \mathcal{CP} $$ -violating effects in the top-Higgs sector using the Standard Model Effective Field Theory (SMEFT) framework. Focusing on top-pair production in association with a Higgs boson and single top-Higgs associated production at the LHC, we study CP $$ \mathcal{CP} $$ violation in the top-Higgs Yukawa coupling and other Higgs and top interactions entering these processes. By analysing CP $$ \mathcal{CP} $$ -sensitive differential observables and asymmetries, we provide direct constraints on CP $$ \mathcal{CP} $$ -violating interactions in the top-Higgs sector. Our analysis demonstrates how combining t t ¯ h $$ t\overline{t}h $$ and thj production can disentangle the real and imaginary components of the top-Yukawa coupling, offering valuable insights into potential sources of CP $$ \mathcal{CP} $$ violation. The sensitivity of these observables to SMEFT operators provides model-independent constraints on the parameter space, advancing the search for new physics in the top-Higgs sector. |
| format | Article |
| id | doaj-art-443d422a50eb4a8b8f92192c1b2d92cc |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-443d422a50eb4a8b8f92192c1b2d92cc2025-08-20T04:01:43ZengSpringerOpenJournal of High Energy Physics1029-84792025-06-012025613210.1007/JHEP06(2025)052Sensitivity to CP $$ \mathcal{CP} $$ -violating effective couplings in the top-Higgs sectorVíctor Miralles0Yvonne Peters1Eleni Vryonidou2Joshua K. Winter3Department of Physics and Astronomy, University of ManchesterDepartment of Physics and Astronomy, University of ManchesterDepartment of Physics and Astronomy, University of ManchesterDepartment of Physics and Astronomy, University of ManchesterAbstract The observed baryon asymmetry of the Universe requires new sources of charge-parity ( CP $$ \mathcal{CP} $$ ) violation beyond those in the Standard Model. In this work, we investigate CP $$ \mathcal{CP} $$ -violating effects in the top-Higgs sector using the Standard Model Effective Field Theory (SMEFT) framework. Focusing on top-pair production in association with a Higgs boson and single top-Higgs associated production at the LHC, we study CP $$ \mathcal{CP} $$ violation in the top-Higgs Yukawa coupling and other Higgs and top interactions entering these processes. By analysing CP $$ \mathcal{CP} $$ -sensitive differential observables and asymmetries, we provide direct constraints on CP $$ \mathcal{CP} $$ -violating interactions in the top-Higgs sector. Our analysis demonstrates how combining t t ¯ h $$ t\overline{t}h $$ and thj production can disentangle the real and imaginary components of the top-Yukawa coupling, offering valuable insights into potential sources of CP $$ \mathcal{CP} $$ violation. The sensitivity of these observables to SMEFT operators provides model-independent constraints on the parameter space, advancing the search for new physics in the top-Higgs sector.https://doi.org/10.1007/JHEP06(2025)052Anomalous Higgs CouplingsSMEFT |
| spellingShingle | Víctor Miralles Yvonne Peters Eleni Vryonidou Joshua K. Winter Sensitivity to CP $$ \mathcal{CP} $$ -violating effective couplings in the top-Higgs sector Journal of High Energy Physics Anomalous Higgs Couplings SMEFT |
| title | Sensitivity to CP $$ \mathcal{CP} $$ -violating effective couplings in the top-Higgs sector |
| title_full | Sensitivity to CP $$ \mathcal{CP} $$ -violating effective couplings in the top-Higgs sector |
| title_fullStr | Sensitivity to CP $$ \mathcal{CP} $$ -violating effective couplings in the top-Higgs sector |
| title_full_unstemmed | Sensitivity to CP $$ \mathcal{CP} $$ -violating effective couplings in the top-Higgs sector |
| title_short | Sensitivity to CP $$ \mathcal{CP} $$ -violating effective couplings in the top-Higgs sector |
| title_sort | sensitivity to cp mathcal cp violating effective couplings in the top higgs sector |
| topic | Anomalous Higgs Couplings SMEFT |
| url | https://doi.org/10.1007/JHEP06(2025)052 |
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