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
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/80331
Ver los metadatos del registro completo
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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:UNLP2025-09-29T11:14:46Zoai: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:13292025-09-29 11:14:47.173SEDICI (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) |
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openAccess |
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http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) |
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