Search for single top-quark production via flavour-changing neutral currents at 8 TeV with the ATLAS detector
- Autores
- Alconada Verzini, María Josefina; Alonso, Francisco; Arduh, Francisco Anuar; Dova, María Teresa; Monticelli, Fernando Gabriel; Wahlberg, Hernán Pablo; The ATLAS Collaboration
- Año de publicación
- 2016
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- A search for single top-quark production via flavour-changing neutral current processes from gluon plus up- or charm-quark initial states in proton–proton collisions at the LHC is presented. Data collected with the ATLAS detector in 2012 at a centre-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 20.3 fb-1 are used. Candidate events for a top quark decaying into a lepton, a neutrino and a jet are selected and classified into signal- and background-like candidates using a neural network. No signal is observed and an upper limit on the production cross-section multiplied by the t → Wb branching fraction is set. The observed 95 % CL limit is σqg→t × B(t → Wb) < 3.4 pb and the expected 95 % CL limit is σqg→t × B(t → Wb) < 2.9 pb. The observed limit can be interpreted as upper limits on the coupling constants of the flavour-changing neutral current interactions divided by the scale of new physics κugt /Λ < 5.8 × 10-3 TeV-1 and κcgt /Λ < 13×10-3 TeV and on the branching fractions B(t → ug) < 4.0 × 10-5 and B(t → cg) < 20 × 10-5.
La lista completa de autores que integran el documento puede consultarse en el archivo.
Facultad de Ciencias Exactas
Instituto de Física La Plata - Materia
-
Ciencias Exactas
Física
quarks
ATLAS detector - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/87008
Ver los metadatos del registro completo
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Search for single top-quark production via flavour-changing neutral currents at 8 TeV with the ATLAS detectorAlconada Verzini, María JosefinaAlonso, FranciscoArduh, Francisco AnuarDova, María TeresaMonticelli, Fernando GabrielWahlberg, Hernán PabloThe ATLAS CollaborationCiencias ExactasFísicaquarksATLAS detectorA search for single top-quark production via flavour-changing neutral current processes from gluon plus up- or charm-quark initial states in proton–proton collisions at the LHC is presented. Data collected with the ATLAS detector in 2012 at a centre-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 20.3 fb<sup>-1</sup> are used. Candidate events for a top quark decaying into a lepton, a neutrino and a jet are selected and classified into signal- and background-like candidates using a neural network. No signal is observed and an upper limit on the production cross-section multiplied by the t → Wb branching fraction is set. The observed 95 % CL limit is σ<sub>qg→t</sub> × B(t → Wb) < 3.4 pb and the expected 95 % CL limit is σ<sub>qg→t</sub> × B(t → Wb) < 2.9 pb. The observed limit can be interpreted as upper limits on the coupling constants of the flavour-changing neutral current interactions divided by the scale of new physics κ<sub>ugt</sub> /Λ < 5.8 × 10<sup>-3</sup> TeV<sup>-1</sup> and κ<sub>cgt</sub> /Λ < 13×10<sup>-3</sup> TeV and on the branching fractions B(t → ug) < 4.0 × 10<sup>-5</sup> and B(t → cg) < 20 × 10<sup>-5</sup>.La lista completa de autores que integran el documento puede consultarse en el archivo.Facultad de Ciencias ExactasInstituto de Física La Plata2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/87008enginfo:eu-repo/semantics/altIdentifier/issn/1434-6044info:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-016-3876-4info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T16:57:38Zoai:sedici.unlp.edu.ar:10915/87008Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:57:38.341SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Search for single top-quark production via flavour-changing neutral currents at 8 TeV with the ATLAS detector |
| title |
Search for single top-quark production via flavour-changing neutral currents at 8 TeV with the ATLAS detector |
| spellingShingle |
Search for single top-quark production via flavour-changing neutral currents at 8 TeV with the ATLAS detector Alconada Verzini, María Josefina Ciencias Exactas Física quarks ATLAS detector |
| title_short |
Search for single top-quark production via flavour-changing neutral currents at 8 TeV with the ATLAS detector |
| title_full |
Search for single top-quark production via flavour-changing neutral currents at 8 TeV with the ATLAS detector |
| title_fullStr |
Search for single top-quark production via flavour-changing neutral currents at 8 TeV with the ATLAS detector |
| title_full_unstemmed |
Search for single top-quark production via flavour-changing neutral currents at 8 TeV with the ATLAS detector |
| title_sort |
Search for single top-quark production via flavour-changing neutral currents at 8 TeV with the ATLAS detector |
| dc.creator.none.fl_str_mv |
Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration |
| author |
Alconada Verzini, María Josefina |
| author_facet |
Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration |
| author_role |
author |
| author2 |
Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration |
| author2_role |
author author author author author author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas Física quarks ATLAS detector |
| topic |
Ciencias Exactas Física quarks ATLAS detector |
| dc.description.none.fl_txt_mv |
A search for single top-quark production via flavour-changing neutral current processes from gluon plus up- or charm-quark initial states in proton–proton collisions at the LHC is presented. Data collected with the ATLAS detector in 2012 at a centre-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 20.3 fb<sup>-1</sup> are used. Candidate events for a top quark decaying into a lepton, a neutrino and a jet are selected and classified into signal- and background-like candidates using a neural network. No signal is observed and an upper limit on the production cross-section multiplied by the t → Wb branching fraction is set. The observed 95 % CL limit is σ<sub>qg→t</sub> × B(t → Wb) < 3.4 pb and the expected 95 % CL limit is σ<sub>qg→t</sub> × B(t → Wb) < 2.9 pb. The observed limit can be interpreted as upper limits on the coupling constants of the flavour-changing neutral current interactions divided by the scale of new physics κ<sub>ugt</sub> /Λ < 5.8 × 10<sup>-3</sup> TeV<sup>-1</sup> and κ<sub>cgt</sub> /Λ < 13×10<sup>-3</sup> TeV and on the branching fractions B(t → ug) < 4.0 × 10<sup>-5</sup> and B(t → cg) < 20 × 10<sup>-5</sup>. La lista completa de autores que integran el documento puede consultarse en el archivo. Facultad de Ciencias Exactas Instituto de Física La Plata |
| description |
A search for single top-quark production via flavour-changing neutral current processes from gluon plus up- or charm-quark initial states in proton–proton collisions at the LHC is presented. Data collected with the ATLAS detector in 2012 at a centre-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 20.3 fb<sup>-1</sup> are used. Candidate events for a top quark decaying into a lepton, a neutrino and a jet are selected and classified into signal- and background-like candidates using a neural network. No signal is observed and an upper limit on the production cross-section multiplied by the t → Wb branching fraction is set. The observed 95 % CL limit is σ<sub>qg→t</sub> × B(t → Wb) < 3.4 pb and the expected 95 % CL limit is σ<sub>qg→t</sub> × B(t → Wb) < 2.9 pb. The observed limit can be interpreted as upper limits on the coupling constants of the flavour-changing neutral current interactions divided by the scale of new physics κ<sub>ugt</sub> /Λ < 5.8 × 10<sup>-3</sup> TeV<sup>-1</sup> and κ<sub>cgt</sub> /Λ < 13×10<sup>-3</sup> TeV and on the branching fractions B(t → ug) < 4.0 × 10<sup>-5</sup> and B(t → cg) < 20 × 10<sup>-5</sup>. |
| publishDate |
2016 |
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2016 |
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