Differential cross-section measurements of WbWb production in the lepton+jets channel at √s = 13 TeV with the ATLAS detector
| dc.contributor.author | Chen, Bohan | |
| dc.contributor.supervisor | Kowalewski, Robert V. | |
| dc.date.accessioned | 2024-08-28T21:31:27Z | |
| dc.date.available | 2024-08-28T21:31:27Z | |
| dc.date.issued | 2024 | |
| dc.degree.department | Department of Physics and Astronomy | |
| dc.degree.level | Doctor of Philosophy PhD | |
| dc.description.abstract | The top quark provides a unique opportunity to test the Standard Model of particle physics. Its heavy mass causes it to decay before it can hadronize, allowing for the study of the properties of a bare quark. This thesis presents differential cross-section measurements stemming from various top quark processes. This measurement is conducted in the presently uncovered semileptonic channel, where one W boson decays leptonically and the other decays hadronically. The analysis is motivated by the need to improve the modeling of the interference effects between singly-resonant and doubly-resonant top quark decays. This effect has been the source of significant modeling uncertainties in other top-sector analyses. The data and simulation used to perform this analysis correspond to the full ATLAS Run 2 dataset, collected 2015-2018. This data corresponds to an integrated luminosity of 140 fb^{-1} and a center of mass energy of √s = 13 TeV. The measured cross-sections are compared to predictions using different combinations of MC generators. Together with a complementary analysis in the dileptonic channel, this thesis provides a means to constrain modeling uncertainties towards the development of an all-inclusive bb4l generator. This generator could model all top quark processes while accurately accounting for all interference effects. | |
| dc.description.scholarlevel | Graduate | |
| dc.identifier.uri | https://hdl.handle.net/1828/20324 | |
| dc.language | English | eng |
| dc.language.iso | en | |
| dc.rights | Available to the World Wide Web | |
| dc.subject | Physics | |
| dc.subject | Particle physics | |
| dc.subject | ATLAS | |
| dc.subject | LHC | |
| dc.subject | Top quark | |
| dc.title | Differential cross-section measurements of WbWb production in the lepton+jets channel at √s = 13 TeV with the ATLAS detector | |
| dc.type | Thesis |