Comprehensive measurements of t-channel single top-quark production cross sections at √s = 7 TeV with the ATLAS detector

This article presents measurements of the t-channel single top-quark (t) and top-antiquark (t¯) total production cross sections σ(tq) and σ(t¯q), their ratio Rt=σ(tq)/σ(t¯q), and a measurement of the inclusive production cross section σ(tq+t¯q) in proton-proton collisions at √s=7 TeV at the LHC. Dif...

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Detalles Bibliográficos
Autores principales:	Alconada Verzini, María Josefina, Alonso, Francisco, Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2014
Materias:	Ciencias Exactas Física quark proton-proton collisions Quantum Chromodynamics Cabibbo-Kobayashi-Maskawa matrix element
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/84941
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-84941
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Exactas Física quark proton-proton collisions Quantum Chromodynamics Cabibbo-Kobayashi-Maskawa matrix element
spellingShingle	Ciencias Exactas Física quark proton-proton collisions Quantum Chromodynamics Cabibbo-Kobayashi-Maskawa matrix element Alconada Verzini, María Josefina Alonso, Francisco Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration Comprehensive measurements of t-channel single top-quark production cross sections at √s = 7 TeV with the ATLAS detector
topic_facet	Ciencias Exactas Física quark proton-proton collisions Quantum Chromodynamics Cabibbo-Kobayashi-Maskawa matrix element
description	This article presents measurements of the t-channel single top-quark (t) and top-antiquark (t¯) total production cross sections σ(tq) and σ(t¯q), their ratio Rt=σ(tq)/σ(t¯q), and a measurement of the inclusive production cross section σ(tq+t¯q) in proton-proton collisions at √s=7 TeV at the LHC. Differential cross sections for the tq and t¯q processes are measured as a function of the transverse momentum and the absolute value of the rapidity of t and t¯, respectively. The analyzed data set was recorded with the ATLAS detector and corresponds to an integrated luminosity of 4.59 fb-1. Selected events contain one charged lepton, large missing transverse momentum, and two or three jets. The cross sections are measured by performing a binned maximum-likelihood fit to the output distributions of neural networks. The resulting measurements are σ(tq)=46±1(stat)±6(syst) pb, σ(t¯q)=23±1(stat)±3(syst) pb, Rt=2.04±0.13(stat)±0.12(syst), and σ(tq+t¯q)=68±2(stat)±8(syst) pb, consistent with the Standard Model expectation. The uncertainty on the measured cross sections is dominated by systematic uncertainties, while the uncertainty on Rt is mainly statistical. Using the ratio of σ(tq+t¯q) to its theoretical prediction, and assuming that the top-quark-related CKM matrix elements obey the relation \|Vtb\| >> \|Vts\|,\|Vtd\|, we determine \|Vtb\|=1.02±0.07.
format	Articulo Articulo
author	Alconada Verzini, María Josefina Alonso, Francisco Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration
author_facet	Alconada Verzini, María Josefina Alonso, Francisco Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration
author_sort	Alconada Verzini, María Josefina
title	Comprehensive measurements of t-channel single top-quark production cross sections at √s = 7 TeV with the ATLAS detector
title_short	Comprehensive measurements of t-channel single top-quark production cross sections at √s = 7 TeV with the ATLAS detector
title_full	Comprehensive measurements of t-channel single top-quark production cross sections at √s = 7 TeV with the ATLAS detector
title_fullStr	Comprehensive measurements of t-channel single top-quark production cross sections at √s = 7 TeV with the ATLAS detector
title_full_unstemmed	Comprehensive measurements of t-channel single top-quark production cross sections at √s = 7 TeV with the ATLAS detector
title_sort	comprehensive measurements of t-channel single top-quark production cross sections at √s = 7 tev with the atlas detector
publishDate	2014
url	http://sedici.unlp.edu.ar/handle/10915/84941
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Comprehensive measurements of t-channel single top-quark production cross sections at √s = 7 TeV with the ATLAS detector

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