On lepton flavor universality in top quark decays
Abstract We propose a novel strategy to test lepton flavor universality (LFU) in top decays, applicable to top pair production at colliders. Our proposal exploits information in kinematic distributions and mostly hinges on data-driven techniques, thus having very little dependence on our theoretical...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-01-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP01(2019)032 |
| _version_ | 1819289476703191040 |
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| author | Jernej F. Kamenik Andrey Katz Daniel Stolarski |
| author_facet | Jernej F. Kamenik Andrey Katz Daniel Stolarski |
| author_sort | Jernej F. Kamenik |
| collection | DOAJ |
| description | Abstract We propose a novel strategy to test lepton flavor universality (LFU) in top decays, applicable to top pair production at colliders. Our proposal exploits information in kinematic distributions and mostly hinges on data-driven techniques, thus having very little dependence on our theoretical understanding of top pair production. Based on simplified models accommodating recent hints of LFU violation in charged current B meson decays, we show that existing LHC measurements already provide non-trivial information on the flavor structure and the mass scale of such new physics (NP). We also project that the measurements of LFU in top decays at the high-luminosity LHC could reach a precision at the percent level or below, improving the sensitivity to LFU violating NP in the top sector by more than an order of magnitude compared to existing approaches. |
| first_indexed | 2024-12-24T03:07:28Z |
| format | Article |
| id | doaj.art-6250798279ad4d2d8e84bf45c20689e1 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-24T03:07:28Z |
| publishDate | 2019-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-6250798279ad4d2d8e84bf45c20689e12022-12-21T17:17:56ZengSpringerOpenJournal of High Energy Physics1029-84792019-01-012019112610.1007/JHEP01(2019)032On lepton flavor universality in top quark decaysJernej F. Kamenik0Andrey Katz1Daniel Stolarski2Jožef Stefan InstituteTH Department, CERNOttawa-Carleton Institute for Physics, Carleton UniversityAbstract We propose a novel strategy to test lepton flavor universality (LFU) in top decays, applicable to top pair production at colliders. Our proposal exploits information in kinematic distributions and mostly hinges on data-driven techniques, thus having very little dependence on our theoretical understanding of top pair production. Based on simplified models accommodating recent hints of LFU violation in charged current B meson decays, we show that existing LHC measurements already provide non-trivial information on the flavor structure and the mass scale of such new physics (NP). We also project that the measurements of LFU in top decays at the high-luminosity LHC could reach a precision at the percent level or below, improving the sensitivity to LFU violating NP in the top sector by more than an order of magnitude compared to existing approaches.http://link.springer.com/article/10.1007/JHEP01(2019)032Beyond Standard ModelHeavy Quark Physics |
| spellingShingle | Jernej F. Kamenik Andrey Katz Daniel Stolarski On lepton flavor universality in top quark decays Journal of High Energy Physics Beyond Standard Model Heavy Quark Physics |
| title | On lepton flavor universality in top quark decays |
| title_full | On lepton flavor universality in top quark decays |
| title_fullStr | On lepton flavor universality in top quark decays |
| title_full_unstemmed | On lepton flavor universality in top quark decays |
| title_short | On lepton flavor universality in top quark decays |
| title_sort | on lepton flavor universality in top quark decays |
| topic | Beyond Standard Model Heavy Quark Physics |
| url | http://link.springer.com/article/10.1007/JHEP01(2019)032 |
| work_keys_str_mv | AT jernejfkamenik onleptonflavoruniversalityintopquarkdecays AT andreykatz onleptonflavoruniversalityintopquarkdecays AT danielstolarski onleptonflavoruniversalityintopquarkdecays |