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

doi:10.1007/JHEP01(2016)064

Эндаумент фонд ТГУ!
Впиши своё имя в историю университета
- Сделать пожертвование -

Add to "Quick Collection"

Description	Size	Format
Measurement of the production cross-section of a single top quark in association with a W boson at 8 TeV with the ATLAS experiment	1 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1007/JHEP01(2016)064

#ATLAS, детектор

#Большой адронный коллайдер

#столкновение частиц

Title: Measurement of the production cross-section of a single top quark in association with a W boson at 8 TeV with the ATLAS experiment
Creator: Aad, G.
|
Abdallah, J.
|
Chelkov, G. A.
|
Abbott, B.
Date: 2016
DOI: 10.1007/JHEP01(2016)064
Description: 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 distributions. The W t cross-section, inclusive of decay modes, is measured to be 23.0 ± 1.3(stat.)− 3.5+ 3.2(syst.)±1.1(lumi.) pb. The measured cross-section is used to extract a value for the CKM matrix element |Vtb| of 1.01 ± 0.10 and a lower limit of 0.80 at the 95% confidence level. The cross-section for the production of a top quark and a W boson is also measured in a fiducial acceptance requiring two leptons with pT> 25 GeV and |η| < 2.5, one jet with pT> 20 GeV and |η| < 2.5, and ETmiss > 20 GeV, including both W t and top-quark pair events as signal. The measured value of the fiducial cross-section is 0.85 ± 0.01(stat.)− 0.07+ 0.07(syst.)±0.03(lumi.) pb.

Relationships: Show Relationship Browser for this Object
collection(s): Радиофизический факультет
Identifier: смотреть в электронном каталоге НБ ТГУ
Type: статьи в журналах
Source: Journal of high energy physics. 2016. № 1. P. 064 (1-47)
Language: eng

Created: 26-04-2017

3306 Visitors

2994 Hits

346 Downloads

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