• Home
  1. Home
  2. Measurement of the t t ¯ W and t t ¯ Z production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector
Scientific article
OA Policy
English

Measurement of the t t ¯ W and t t ¯ Z production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector

Contributors

ATLAS Collaboration

Collaborators

Ancu, Lucian Stefan; Bell, William; Benhar Noccioli, Eleonora; Bilbao De Mendizabal, Javier; Calace, Noemi; Clark, Allan Geoffrey; Coccaro, Andrea; Delitzsch, Chris Malena; Della Volpe, Domenico; Ferrere, Didier; Gadomski, Szymon; Golling, Tobias; Gonzalez Sevilla, Sergio; Gramling, Johanna Léna; Guescini, Francesco; Iacobucci, Giuseppe; Katre, Akshay; Mermod, Philippe; Miucci, Antonio; Muenstermann, Daniel; Nessi, Marzio; Paolozzi, Lorenzo; Picazio, Attilio; Ristic, Branislav; Schramm, Steven; Tykhonov, Andrii; Vallecorsa, Sofia; Wu, Xin

Published in

The journal of high energy physics, vol. 1511, p. 172-220

Collection

  • Open Access - SCOAP3

Publication date

2015

Abstract

The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at √s = 8 TeV. The dataset corresponds to an integrated luminosity of 20.3 fb −1 collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the t t ¯ W and t t ¯ Z processes simultaneously yields a significance of 5.0 σ (4.2 σ ) over the background-only hypothesis for t t ¯ W ( t t ¯ Z ) production. The measured cross sections are σ t t ¯ W = 369 − 91 + 100 fb and σ t t ¯ Z = 176 − 52 + 58 fb. The background-only hypothesis with neither t t ¯ W production is excluded at 7.1 σ . All measurements are consistent with next-to-leading-order calculations for the t t ¯ W and t t ¯ Z processes.

Keywords

  • Electroweak interaction
  • Hadron-Hadron scattering
  • Top physics

UNIGE affiliation entities

Citation (ISO format)

ATLAS Collaboration. Measurement of the t t ¯ W and t t ¯ Z production cross sections in pp collisions at √s = 8 TeV with the ATLAS detector. In: The journal of high energy physics, 2015, vol. 1511, p. 172–220. doi: 10.1007/JHEP11(2015)172

Main files (1)

Article (Published version)
CC BY

Identifiers

Journal ISSN

1029-8479
538views
206downloads

Technical informations

Creation

11/01/2016 14:14:09

First validation

11/01/2016 14:14:09

Update

13/10/2025 21:07:24

Status update

15/03/2023 00:02:04

Last indexation

10/11/2026 17:20:20
All rights reserved by Archive ouverte UNIGE and the University of Geneva
OpenAIRE Indexed & Validated