Search for FCNC single top-quark production at √s = 7 TeV with the ATLAS detector
A search for the production of single top-quarks via flavour-changing neutral-currents is presented. Data collected with the ATLAS detector at a centre-of-mass energy of √s = 7 TeV, corresponding to an integrated luminosity of 2.05 fb<sup>-1</sup>, are used. Candidate events with a semil...
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| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2012
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/80315 |
| Aporte de: |
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I19-R120-10915-80315 |
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dspace |
| institution |
Universidad Nacional de La Plata |
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I-19 |
| repository_str |
R-120 |
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SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Física top quark flavour changing neutral currents proton-proton collisions |
| spellingShingle |
Ciencias Exactas Física top quark flavour changing neutral currents proton-proton collisions Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. The ATLAS Collaboration Search for FCNC single top-quark production at √s = 7 TeV with the ATLAS detector |
| topic_facet |
Ciencias Exactas Física top quark flavour changing neutral currents proton-proton collisions |
| description |
A search for the production of single top-quarks via flavour-changing neutral-currents is presented. Data collected with the ATLAS detector at a centre-of-mass energy of √s = 7 TeV, corresponding to an integrated luminosity of 2.05 fb<sup>-1</sup>, are used. Candidate events with a semileptonic top-quark decay signature are classified as signal- or background-like events by using several kinematic variables as input to a neural network. No signal is observed in the neural network output distribution and a Bayesian upper limit is placed on the production cross-section. The observed upper limit at 95% confidence level on the cross-section multiplied by the t → Wb branching fraction is measured to be σ<sub>qg→t</sub> × B(t → Wb) < 3.9 pb. This upper limit is converted using a model-independent approach into upper limits on the coupling strengths κ<sub>ugt</sub>/Λ < 6.9 · 10<sup>-3</sup> TeV<sup>-1</sup> and κ<sub>cgt</sub>/Λ < 1.6 · 10<sup>-2</sup> TeV<sup>-1</sup>,where Λ is the new physics scale, and on the branching fractions B(t → ug) < 5.7 · 10<sup>-5</sup> and B(t → cg) < 2.7 · 10<sup>-4</sup>. |
| format |
Articulo Articulo |
| author |
Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. The ATLAS Collaboration |
| author_facet |
Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. The ATLAS Collaboration |
| author_sort |
Anduaga, Xabier Sebastián |
| title |
Search for FCNC single top-quark production at √s = 7 TeV with the ATLAS
detector |
| title_short |
Search for FCNC single top-quark production at √s = 7 TeV with the ATLAS
detector |
| title_full |
Search for FCNC single top-quark production at √s = 7 TeV with the ATLAS
detector |
| title_fullStr |
Search for FCNC single top-quark production at √s = 7 TeV with the ATLAS
detector |
| title_full_unstemmed |
Search for FCNC single top-quark production at √s = 7 TeV with the ATLAS
detector |
| title_sort |
search for fcnc single top-quark production at √s = 7 tev with the atlas
detector |
| publishDate |
2012 |
| url |
http://sedici.unlp.edu.ar/handle/10915/80315 |
| work_keys_str_mv |
AT anduagaxabiersebastian searchforfcncsingletopquarkproductionats7tevwiththeatlasdetector AT dovamariateresa searchforfcncsingletopquarkproductionats7tevwiththeatlasdetector AT monticellifernandogabriel searchforfcncsingletopquarkproductionats7tevwiththeatlasdetector AT tripianamartinf searchforfcncsingletopquarkproductionats7tevwiththeatlasdetector AT theatlascollaboration searchforfcncsingletopquarkproductionats7tevwiththeatlasdetector |
| bdutipo_str |
Repositorios |
| _version_ |
1764820486833831937 |