Linear power corrections to single top production and decay at the LHC in the narrow width approximation
Abstract We consider top quark production and decay in the narrow width approximation and study if the polarisation effects, that manifest themselves in correlations of angular distributions of particles from top quark decays and final state jets in the production sub-process, are affected by linear...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-11-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP11(2024)112 |
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| author | Sergei Makarov Kirill Melnikov Paolo Nason Melih A. Ozcelik |
| author_facet | Sergei Makarov Kirill Melnikov Paolo Nason Melih A. Ozcelik |
| author_sort | Sergei Makarov |
| collection | DOAJ |
| description | Abstract We consider top quark production and decay in the narrow width approximation and study if the polarisation effects, that manifest themselves in correlations of angular distributions of particles from top quark decays and final state jets in the production sub-process, are affected by linear power corrections. We find that, in general, the answer to this question is affirmative. We also discuss how these non-perturbative corrections affect polarisation observables used to study single top production at the LHC. Finally, we point out that generic kinematic distributions of leptons from top quark decays are affected by linear power corrections, which may have implications for proposals to extract the top quark mass from such leptonic observables. On the other hand, we demonstrate that the distribution of the “out-of-collision-plane” component of the positron momentum is free from linear power corrections, making it an interesting candidate for the top quark mass measurement. |
| format | Article |
| id | doaj-art-7714c3e500434f36a294c862dfe55f1c |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-7714c3e500434f36a294c862dfe55f1c2024-12-08T12:09:37ZengSpringerOpenJournal of High Energy Physics1029-84792024-11-0120241113910.1007/JHEP11(2024)112Linear power corrections to single top production and decay at the LHC in the narrow width approximationSergei Makarov0Kirill Melnikov1Paolo Nason2Melih A. Ozcelik3Institute for Theoretical Particle Physics, KITInstitute for Theoretical Particle Physics, KITINFN, Sezione di Milano-Bicocca, and Università di Milano-BicoccaUniversité Paris-Saclay, CNRS, IJCLabAbstract We consider top quark production and decay in the narrow width approximation and study if the polarisation effects, that manifest themselves in correlations of angular distributions of particles from top quark decays and final state jets in the production sub-process, are affected by linear power corrections. We find that, in general, the answer to this question is affirmative. We also discuss how these non-perturbative corrections affect polarisation observables used to study single top production at the LHC. Finally, we point out that generic kinematic distributions of leptons from top quark decays are affected by linear power corrections, which may have implications for proposals to extract the top quark mass from such leptonic observables. On the other hand, we demonstrate that the distribution of the “out-of-collision-plane” component of the positron momentum is free from linear power corrections, making it an interesting candidate for the top quark mass measurement.https://doi.org/10.1007/JHEP11(2024)112Nonperturbative EffectsTop QuarkScattering AmplitudesSpecific QCD Phenomenology |
| spellingShingle | Sergei Makarov Kirill Melnikov Paolo Nason Melih A. Ozcelik Linear power corrections to single top production and decay at the LHC in the narrow width approximation Journal of High Energy Physics Nonperturbative Effects Top Quark Scattering Amplitudes Specific QCD Phenomenology |
| title | Linear power corrections to single top production and decay at the LHC in the narrow width approximation |
| title_full | Linear power corrections to single top production and decay at the LHC in the narrow width approximation |
| title_fullStr | Linear power corrections to single top production and decay at the LHC in the narrow width approximation |
| title_full_unstemmed | Linear power corrections to single top production and decay at the LHC in the narrow width approximation |
| title_short | Linear power corrections to single top production and decay at the LHC in the narrow width approximation |
| title_sort | linear power corrections to single top production and decay at the lhc in the narrow width approximation |
| topic | Nonperturbative Effects Top Quark Scattering Amplitudes Specific QCD Phenomenology |
| url | https://doi.org/10.1007/JHEP11(2024)112 |
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