Search for "padding-size-4-x display--inline-block" style="background: var(--highlight-yellow); color: inherit;">tt¯ resonances in fully hadronic final states in "padding-size-4-x display--inline-block" style="background: var(--highlight-yellow); color: inherit;">pp collisions at √s = 13 TeV with the ATLAS detector
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Archivos
Fecha
2020-10
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
Springer Science and Business Media Deutschland GmbH
Nombre de Curso
Licencia CC
Attribution 4.0 International (CC BY 4.0)
Licencia CC
https://creativecommons.org/licenses/by/4.0/
Resumen
This paper presents a search for new heavy particles decaying into a pair of top quarks using 139 fb−1 of proton-proton collision data recorded at a centre-of-mass energy of s = 13 TeV with the ATLAS detector at the Large Hadron Collider. The search is performed using events consistent with pair production of high-transverse-momentum top quarks and their subsequent decays into the fully hadronic final states. The analysis is optimized for resonances decaying into a "padding-size-4-x display--inline-block" style="background: var(--highlight-yellow); color: inherit;">tt¯ pair with mass above 1.4 TeV, exploiting a dedicated multivariate technique with jet substructure to identify hadronically decaying top quarks using large-radius jets and evaluating the background expectation from data. No significant deviation from the background prediction is observed. Limits are set on the production cross-section times branching fraction for the new Z′ boson in a topcolor-assisted-technicolor model. The Z′ boson masses below 3.9 and 4.7 TeV are excluded at 95% confidence level for the decay widths of 1% and 3%, respectively. [Figure not available: see fulltext.] © 2020, The Author(s).
Notas
Indexación: Scopus.
Palabras clave
Beyond Standard Model, Hadron-Hadron scattering (experiments), Heavy quark production, Jet substructure, Jets
Citación
Journal of High Energy PhysicsOpen AccessVolume 2020, Issue 101 October 2020 Article number 61
DOI
10.1007/JHEP10(2020)061