Search for CP violation using t¯t events in the lepton+jets channel in pp collisions at √s = 13 TeV
Results are presented on a search for CP violation in the production and decay of top quark-antiquark pairs in the lepton+jets channel. The search is based on data from proton-proton collisions at √ s = 13 TeV, collected with the CMS detector, corresponding to an integrated luminosity of 138 fb−1 ....
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | Brasil |
| Institución: | Universidade Federal do Rio Grande do Sul (UFRGS) |
| Repositorio: | Repositório Institucional da UFRGS |
| Idioma: | inglés |
| OAI Identifier: | oai:www.lume.ufrgs.br:10183/270377 |
| Acceso en línea: | http://hdl.handle.net/10183/270377 |
| Access Level: | acceso abierto |
| Palabra clave: | Aceleradores de partículas Hadrons Colisões proton-proton CP violation Hadron-Hadron scattering Top Physics |
| Sumario: | Results are presented on a search for CP violation in the production and decay of top quark-antiquark pairs in the lepton+jets channel. The search is based on data from proton-proton collisions at √ s = 13 TeV, collected with the CMS detector, corresponding to an integrated luminosity of 138 fb−1 . Possible CP violation effects are evaluated by measuring asymmetries in observables constructed from linearly independent four-momentum vectors of the final-state particles. The dimensionless chromoelectric dipole moment of the top quark obtained from the observed asymmetries is measured to be 0.04±0.10 (stat)±0.07(syst), and the asymmetries exhibit no evidence for CP-violating effects, consistent with expectations from the standard model. |
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