Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Anders, John Kenneth; Beck, Hans Peter; Ereditato, Antonio; Mullier, Geoffrey André Adrien; Rimoldi, Marco; Weston, Thomas Daniel (2019). Search for four-top-quark production in the single-lepton and opposite-sign dilepton final states in pp collisions at √s=13 TeV with the ATLAS detector. Physical review. D - particles, fields, gravitation, and cosmology, 99(5) American Physical Society 10.1103/PhysRevD.99.052009
|
Text
PhysRevD.99.052009.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (1MB) | Preview |
A search for four-top-quark production, tt¯tt¯, is presented. It is based on proton-proton collision data with a center-of-mass energy √s=13 TeV collected by the ATLAS detector at the Large Hadron Collider during the years 2015 and 2016, corresponding to an integrated luminosity of 36.1 fb−1. Data are analyzed in both the single-lepton and opposite-sign dilepton channels, characterized by the presence of one or two isolated electrons or muons with high-transverse momentum and multiple jets. A data-driven method is used to estimate the dominant background from top-quark pair production in association with jets. No significant excess above the Standard Model expectation is observed. The result is combined with the previous same-sign dilepton and multilepton searches carried out by the ATLAS Collaboration and an observed (expected) upper limit of 5.3 (2.1) times the four-top-quark Standard Model cross section is obtained at 95% confidence level. Additionally, an upper limit on the anomalous four-top-quark production cross section is set in the context of an effective field theory model.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Miucci, Antonio, Merlassino, Claudia, Haug, Sigve, Weber, Michele, Anders, John Kenneth, Beck, Hans Peter, Ereditato, Antonio, Mullier, Geoffrey André Adrien, Rimoldi, Marco, Weston, Thomas Daniel |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1550-7998 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
BORIS Import LHEP |
Date Deposited: |
18 Jun 2020 16:39 |
Last Modified: |
05 Dec 2022 15:38 |
Publisher DOI: |
10.1103/PhysRevD.99.052009 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt; ATLAS collaboration |
BORIS DOI: |
10.7892/boris.143629 |
URI: |
https://boris.unibe.ch/id/eprint/143629 |
Actions (login required)
 |
Edit item |