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

The, ATLAS collaboration
•
Aad, G.
•
Abbott, B.
altro
GIORDANI, Mario
2015
  • journal article

Periodico
JOURNAL OF HIGH ENERGY PHYSICS
Abstract
The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at root 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) over barW and t (t) over barZ processes simultaneously yields a significance of 5.0 sigma (4.2 sigma) over the background-only hypothesis for t (t) over barW (t (t) over barZ) production. The measured cross sections are sigma(t (t) over barW) = 369(-91)(+100) fb and sigma(t (t) over barZ) = 176(-52)(+58) fb. The background-only hypothesis with neither t (t) over barW nor t (t) over barZ production is excluded at 7.1 sigma. All measurements are consistent with next-to-leading-order calculations for the t (t) over barW and t (t) over barZ processes
DOI
10.1007/JHEP11(2015)172
WOS
WOS:000366139900001
Archivio
http://hdl.handle.net/11390/1097244
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84949438970
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84949438970&partnerID=40&md5=24ad0ac6d18bb6f29f0f372422f8f223
Diritti
metadata only access
Scopus© citazioni
32
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
45
Data di acquisizione
Mar 28, 2024
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