publication . Article . Preprint . Other literature type . 2016

Measurement of the production cross-section of a single top quark in association with a W boson at 8 TeV with the ATLAS experiment

Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Aben, R.; Abolins, M.; AbouZeid, O.S.; Abramowicz, H.; Abreu, H.; Abreu, R.; ...
Open Access English
  • Published: 11 Jan 2016
Abstract
The cross-section for the production of a single top quark in association with a W boson in proton-proton collisions at s√=8TeV is measured. The dataset corresponds to an integrated luminosity of 20.3 fb−1, collected by the ATLAS detector in 2012 at the Large Hadron Collider at CERN. Events containing two leptons and one central b-jet are selected. The W t signal is separated from the backgrounds using boosted decision trees, each of which combines a number of discriminating variables into one classifier. Production of W t events is observed with a significance of 7.7σ. The cross-section is extracted in a profile likelihood fit to the classifier output distribut...
Subjects
arXiv: High Energy Physics::Experiment
free text keywords: scattering [p p], colliding beams [p p], measured [cross section], single production [top], hadroproduction [W], associated production [W], bottom [jet], ((n)jet dilepton) [final state], ATLAS, CERN LHC Coll, measured [channel cross section], validity test [standard model], acceptance, CKM matrix, background, CERN Lab, data analysis method, experimental results, p p --> top W anything, 8000 GeV-cms, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physik, Hadron-Hadron scattering, Top physics, 530, Nuclear and High Energy Physics, Ciencias Exactas, Física, hadron-hadron scattering, top physics, top quark, w boson, proton-proton collisions, ATLAS, детектор, Большой адронный коллайдер, столкновение частиц, Hadron-Hadron scattering; Top physics, Settore FIS/01 - Fisica Sperimentale, Settore FIS/04 - Fisica Nucleare e Subnucleare, Ciências Naturais::Ciências Físicas, Science & Technology, :Ciências Físicas [Ciências Naturais], Hadron-Hadron scattering; Top physics; HADRON COLLIDERS; P(P)OVER-BAR COLLISIONS; MEASURING MASSES; PAIR; PRODUCTION; ROOT-S=7 TEV; SEARCH; RESUMMATION; DETECTOR; LHC, Physical Sciences, Fysik, Hadron-Hadron scattering; Top physics; Nuclear and High Energy Physics, QC, High Energy Physics - Experiment, Particle Physics - Experiment, ddc:530, ddc:500.2, W and Z bosons, ATLAS experiment, Physics, Particle physics
Funded by
EC| EPLANET
Project
EPLANET
European Particle physics Latin American NETwork
  • Funder: European Commission (EC)
  • Project Code: 246806
  • Funding stream: FP7 | SP3 | PEOPLE

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