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dc.date.accessioned | 2021-09-27T16:55:35Z | |
dc.date.available | 2021-09-27T16:55:35Z | |
dc.date.issued | 2018-07-31 | |
dc.identifier.uri | http://sedici.unlp.edu.ar/handle/10915/125669 | |
dc.description.abstract | A search for flavour-changing neutral-current processes in top-quark decays is presented. Data collected with the ATLAS detector from proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of √s =13 TeV, corresponding to an integrated luminosity of 36.1 fb⁻¹, are analysed. The search is performed using top-quark pair events, with one top quark decaying through the t → qZ (q = u, c) flavour-changing neutral-current channel, and the other through the dominant Standard Model mode t → bW. Only Z boson decays into charged leptons and leptonic W boson decays are considered as signal. Consequently, the final-state topology is characterized by the presence of three isolated charged leptons (electrons or muons), at least two jets, one of the jets originating from a b-quark, and missing transverse momentum from the undetected neutrino. The data are consistent with Standard Model background contributions, and at 95% confidence level the search sets observed (expected) upper limits of 1.7 × 10⁻⁴ (2.4 × 10⁻⁴ on the t → uZ branching ratio and 2.4 × 10⁻⁴ (3.2 × 10⁻⁴) on the t → cZ branching ratio, constituting the most stringent limits to date. | en |
dc.language | en | es |
dc.subject | Hadron-Hadron scattering (experiments) | es |
dc.title | Search for flavour-changing neutral current top-quark decays t → qZ in proton-proton collisions at √s = 13 TeV with the ATLAS detector | en |
dc.type | Articulo | es |
sedici.identifier.other | arXiv:1803.09923 | es |
sedici.identifier.other | doi:10.1007/jhep07(2018)176 | es |
sedici.identifier.issn | 1029-8479 | es |
sedici.creator.person | Alconada Verzini, María Josefina | es |
sedici.creator.person | Alonso, Francisco | es |
sedici.creator.person | Arduh, Francisco Anuar | es |
sedici.creator.person | Dova, María Teresa | es |
sedici.creator.person | Hoya, Joaquín | es |
sedici.creator.person | Monticelli, Fernando Gabriel | es |
sedici.creator.person | Wahlberg, Hernán Pablo | es |
sedici.creator.corporate | The ATLAS Collaboration | es |
sedici.description.note | La lista completa de autores que integran el documento puede consultarse en el archivo. | es |
sedici.subject.materias | Ciencias Exactas | es |
sedici.subject.materias | Física | es |
sedici.description.fulltext | true | es |
mods.originInfo.place | Facultad de Ciencias Exactas | es |
mods.originInfo.place | Instituto de Física La Plata | es |
sedici.subtype | Articulo | es |
sedici.rights.license | Creative Commons Attribution 4.0 International (CC BY 4.0) | |
sedici.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
sedici.description.peerReview | peer-review | es |
sedici.relation.journalTitle | Journal of High Energy Physics | es |
sedici.relation.journalVolumeAndIssue | vol. 2018, no. 7 | es |