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

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 th...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín F., The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Ciencias Exactas
Física
top quark
ATLAS detector
la̵rge hadron collider
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/80331
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-80331
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
top quark
ATLAS detector
la̵rge hadron collider
spellingShingle Ciencias Exactas
Física
top quark
ATLAS detector
la̵rge hadron collider
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detector
topic_facet Ciencias Exactas
Física
top quark
ATLAS detector
la̵rge hadron collider
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.
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 Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detector
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
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/80331
work_keys_str_mv AT anduagaxabiersebastian measurementofthetchannelsingletopquarkproductioncrosssectioninppcollisionsats7tevwiththeatlasdetector
AT dovamariateresa measurementofthetchannelsingletopquarkproductioncrosssectioninppcollisionsats7tevwiththeatlasdetector
AT monticellifernandogabriel measurementofthetchannelsingletopquarkproductioncrosssectioninppcollisionsats7tevwiththeatlasdetector
AT tripianamartinf measurementofthetchannelsingletopquarkproductioncrosssectioninppcollisionsats7tevwiththeatlasdetector
AT theatlascollaboration measurementofthetchannelsingletopquarkproductioncrosssectioninppcollisionsats7tevwiththeatlasdetector
bdutipo_str Repositorios
_version_ 1764820486849560580

Ejemplares similares