Search for top quark partners with charge 5/3 in the same-sign dilepton and single-lepton final states in proton-proton collisions at √s = 13 TeV
A search for the pair production of heavy fermionic partners of the top quark with charge 5/3 (X5=3) is performed in proton-proton collisions at a center-of-mass energy of 13TeV with the CMS detector at the CERN LHC. The data sample analyzed corresponds to an integrated luminosity of 35.9 fb1. The X...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| 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:10183/196320 |
| Acceso en línea: | http://hdl.handle.net/10183/196320 |
| Access Level: | acceso abierto |
| Palabra clave: | Aceleradores de partículas Colisões proton-proton Leptons Beyond standard model Hadron-Hadron scattering (experiments) Top physics |
| Sumario: | A search for the pair production of heavy fermionic partners of the top quark with charge 5/3 (X5=3) is performed in proton-proton collisions at a center-of-mass energy of 13TeV with the CMS detector at the CERN LHC. The data sample analyzed corresponds to an integrated luminosity of 35.9 fb1. The X5=3 quark is assumed always to decay into a top quark and a W boson. Both the right-handed and left-handed X5=3 couplings to the W boson are considered. Final states with either a pair of same-sign leptons or a single lepton are studied. No signi cant excess of events is observed above the expected standard model background. Lower limits at 95% con dence level on the X5=3 quark mass are set at 1.33 and 1.30TeV respectively for the case of right-handed and left-handed couplings to W bosons in a combination of the same-sign dilepton and single-lepton nal states. |
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