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Abstract:

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 σ t =83±4(stat.) −19 +20 (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 tb |≫|V ts |,|V td |, the coupling strength at the W-t-b vertex is determined to be |V tb |=1.13 −0.13 +0.14 . If it is assumed that |V tb |⩽1 a lower limit of |V tb |>0.75 is obtained at the 95% confidence level. © 2012 CERN

Registro:

Documento: Artículo
Título:Measurement of the t-channel single top-quark production cross section in pp collisions at s=7 TeV with the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 3051 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 3051 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2012
Volumen:717
Número:4-5
Página de inicio:330
Página de fin:350
DOI: http://dx.doi.org/10.1016/j.physletb.2012.09.031
Título revista:Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Título revista abreviado:Phys Lett Sect B Nucl Elem Part High-Energy Phys
ISSN:03702693
CODEN:PYLBA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v717_n4-5_p330_Aad

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Citas:

---------- APA ----------
(2012) . Measurement of the t-channel single top-quark production cross section in pp collisions at s=7 TeV with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 717(4-5), 330-350.
http://dx.doi.org/10.1016/j.physletb.2012.09.031
---------- CHICAGO ----------
Aad, G. "Measurement of the t-channel single top-quark production cross section in pp collisions at s=7 TeV with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 717, no. 4-5 (2012) : 330-350.
http://dx.doi.org/10.1016/j.physletb.2012.09.031
---------- MLA ----------
Aad, G. "Measurement of the t-channel single top-quark production cross section in pp collisions at s=7 TeV with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 717, no. 4-5, 2012, pp. 330-350.
http://dx.doi.org/10.1016/j.physletb.2012.09.031
---------- VANCOUVER ----------
Aad, G. Measurement of the t-channel single top-quark production cross section in pp collisions at s=7 TeV with the ATLAS detector. Phys Lett Sect B Nucl Elem Part High-Energy Phys. 2012;717(4-5):330-350.
http://dx.doi.org/10.1016/j.physletb.2012.09.031