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 13 TeV with the CMS detector at the CERN LHC. The data sample analyzed corresponds to an integrated luminosity of 35.9 fb−1 . T...

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Detalles Bibliográficos
Autores: Brochero Cifuentes, J. A., Cabrillo, I. J., Calderon, Alicia, Chazin Quero, B., Duarte Campderros, J., Fernández-García, Marcos, Fernández Manteca, P. J., García Alonso, A., García-Ferrero, J., Gómez, Gervasio, López Virto, A., Marco, Jesús, Martínez-Rivero, Celso, Martínez Ruiz del Arbol, P., Matorras, Francisco, Piedra, Jonatan, Prieels, C., Rodrigo Anoro, Teresa, Ruiz Jimeno, Alberto, Scodellaro, Luca, Trevisani, N., Vila, Iván, Vilar Cortabitarte, R.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/213709
Acceso en línea:http://hdl.handle.net/10261/213709
Access Level:acceso abierto
Palabra clave:Beyond Standard Model
Hadron-Hadron scattering (experiments)
Top physics
ddc:530
Descripción
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 13 TeV with the CMS detector at the CERN LHC. The data sample analyzed corresponds to an integrated luminosity of 35.9 fb−1 . 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 significant excess of events is observed above the expected standard model background. Lower limits at 95% confidence level on the X5/3 quark mass are set at 1.33 and 1.30 TeV 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 final states.

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