Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detector

Autores
Anduaga, Xabier Sebastián; Dova, María Teresa; Monticelli, Fernando Gabriel; Tripiana, Martín F.; The ATLAS Collaboration
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report a measurement of the cross section of single top-quark production in the t-channel using 1.04 fb-1 of pp collision data at √s = 7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momentum, and two or three jets, exactly one of them identified as originating from a b quark. The cross section is measured by fitting the distribution of a multivariate discriminant constructed with a neural network, yielding σt= 83±4(stat.)+20-19(syst.) pb, which is in good agreement with the prediction of the Standard Model. Using the ratio of the measured to the theoretically predicted cross section and assuming that the top-quark-related CKM matrix elements obey the relation |Vtb| ≫ |Vts|,|Vtd|, the coupling strength at the W-t-b vertex is determined to be |Vtb|=1.13+0.14-0.13. If it is assumed that |Vtb| ≤ 1 a lower limit of |Vtb| > 0.75 is obtained at the 95% confidence level.
Facultad de Ciencias Exactas
Materia
Ciencias Exactas
Física
top quark
ATLAS detector
la̵rge hadron collider
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/80331
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/80331
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detectorAnduaga, Xabier SebastiánDova, María TeresaMonticelli, Fernando GabrielTripiana, Martín F.The ATLAS CollaborationCiencias ExactasFísicatop quarkATLAS detectorla̵rge hadron colliderWe report a measurement of the cross section of single top-quark production in the t-channel using 1.04 fb<sup>-1</sup> of pp collision data at √s = 7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momentum, and two or three jets, exactly one of them identified as originating from a b quark. The cross section is measured by fitting the distribution of a multivariate discriminant constructed with a neural network, yielding σ<sub>t</sub>= 83±4(stat.)<sup>+20</sup><sub>-19</sub>(syst.) pb, which is in good agreement with the prediction of the Standard Model. Using the ratio of the measured to the theoretically predicted cross section and assuming that the top-quark-related CKM matrix elements obey the relation |V<sub>tb</sub>| ≫ |V<sub>ts</sub>|,|V<sub>td</sub>|, the coupling strength at the W-t-b vertex is determined to be |V<sub>tb</sub>|=1.13<sup>+0.14</sup><sub>-0.13</sub>. If it is assumed that |V<sub>tb</sub>| ≤ 1 a lower limit of |V<sub>tb</sub>| > 0.75 is obtained at the 95% confidence level.Facultad de Ciencias Exactas2012-09-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf330-350http://sedici.unlp.edu.ar/handle/10915/80331enginfo:eu-repo/semantics/altIdentifier/issn/0370-2693info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physletb.2012.09.031info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:06:43Zoai:sedici.unlp.edu.ar:10915/80331Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:06:43.652SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detector
title Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detector
spellingShingle Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detector
Anduaga, Xabier Sebastián
Ciencias Exactas
Física
top quark
ATLAS detector
la̵rge hadron collider
title_short Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detector
title_full Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detector
title_fullStr Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detector
title_full_unstemmed Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detector
title_sort Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detector
dc.creator.none.fl_str_mv Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author Anduaga, Xabier Sebastián
author_facet Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_role author
author2 Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Física
top quark
ATLAS detector
la̵rge hadron collider
topic Ciencias Exactas
Física
top quark
ATLAS detector
la̵rge hadron collider
dc.description.none.fl_txt_mv We report a measurement of the cross section of single top-quark production in the t-channel using 1.04 fb<sup>-1</sup> of pp collision data at √s = 7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momentum, and two or three jets, exactly one of them identified as originating from a b quark. The cross section is measured by fitting the distribution of a multivariate discriminant constructed with a neural network, yielding σ<sub>t</sub>= 83±4(stat.)<sup>+20</sup><sub>-19</sub>(syst.) pb, which is in good agreement with the prediction of the Standard Model. Using the ratio of the measured to the theoretically predicted cross section and assuming that the top-quark-related CKM matrix elements obey the relation |V<sub>tb</sub>| ≫ |V<sub>ts</sub>|,|V<sub>td</sub>|, the coupling strength at the W-t-b vertex is determined to be |V<sub>tb</sub>|=1.13<sup>+0.14</sup><sub>-0.13</sub>. If it is assumed that |V<sub>tb</sub>| ≤ 1 a lower limit of |V<sub>tb</sub>| > 0.75 is obtained at the 95% confidence level.
Facultad de Ciencias Exactas
description We report a measurement of the cross section of single top-quark production in the t-channel using 1.04 fb<sup>-1</sup> of pp collision data at √s = 7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momentum, and two or three jets, exactly one of them identified as originating from a b quark. The cross section is measured by fitting the distribution of a multivariate discriminant constructed with a neural network, yielding σ<sub>t</sub>= 83±4(stat.)<sup>+20</sup><sub>-19</sub>(syst.) pb, which is in good agreement with the prediction of the Standard Model. Using the ratio of the measured to the theoretically predicted cross section and assuming that the top-quark-related CKM matrix elements obey the relation |V<sub>tb</sub>| ≫ |V<sub>ts</sub>|,|V<sub>td</sub>|, the coupling strength at the W-t-b vertex is determined to be |V<sub>tb</sub>|=1.13<sup>+0.14</sup><sub>-0.13</sub>. If it is assumed that |V<sub>tb</sub>| ≤ 1 a lower limit of |V<sub>tb</sub>| > 0.75 is obtained at the 95% confidence level.
publishDate 2012
dc.date.none.fl_str_mv 2012-09-17
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/80331
url http://sedici.unlp.edu.ar/handle/10915/80331
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0370-2693
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physletb.2012.09.031
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
dc.format.none.fl_str_mv application/pdf
330-350
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.22299

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