Simultaneous measurements of the tt¯, W<sup>+</sup>W<sup>-</sup>, and Z/γ* →ττ production cross-sections in pp collisions at √s = 7 TeV with the ATLAS detector

Simultaneous measurements of the tt¯, W<sup>+</sup>W<sup>-</sup>, and Z/γ*→ττ production cross-sections using an integrated luminosity of 4.6 fb<sup>-1</sup> of pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC are presented. Events are select...

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Detalles Bibliográficos
Autores principales: Alconada Verzini, María Josefina, Alonso, Francisco, Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Exactas
Física
proton-proton collisions
ATLAS detector
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86837
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86837
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
proton-proton collisions
ATLAS detector
spellingShingle Ciencias Exactas
Física
proton-proton collisions
ATLAS detector
Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Simultaneous measurements of the tt¯, W<sup>+</sup>W<sup>-</sup>, and Z/γ* →ττ production cross-sections in pp collisions at √s = 7 TeV with the ATLAS detector
topic_facet Ciencias Exactas
Física
proton-proton collisions
ATLAS detector
description Simultaneous measurements of the tt¯, W<sup>+</sup>W<sup>-</sup>, and Z/γ*→ττ production cross-sections using an integrated luminosity of 4.6 fb<sup>-1</sup> of pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC are presented. Events are selected with two high transverse momentum leptons consisting of an oppositely charged electron and muon pair. The three processes are separated using the distributions of the missing transverse momentum of events with zero and greater than zero jet multiplicities. Measurements of the fiducial cross-section are presented along with results that quantify for the first time the underlying correlations in the predicted and measured cross-sections due to proton parton distribution functions. These results indicate that the correlated next-to-leading-order predictions for tt¯ and Z/γ*→ττ underestimate the data, while those at next-to-next-to-leading-order generally describe the data well. The full cross-sections are measured to be σ(tt¯)=181.2±2.8<sup>+9.7</sup><sub>-9.5</sub>±3.3±3.3 pb, σ(W<sup>+</sup>W<sup>-</sup>)=53.3±2.7<sup>+7.3</sup><sub>-8.0</sub>±1.0±0.5 pb, and σ(Z/γ*→ττ)=1174±24<sup>+72</sup><sub>-87</sub>±21±9 pb, where the cited uncertainties are due to statistics, systematic effects, luminosity and the LHC beam energy measurement, respectively. The W+W- measurement includes the small contribution from Higgs boson decays, H→W<sup>+</sup>W<sup>-</sup>.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_sort Alconada Verzini, María Josefina
title Simultaneous measurements of the tt¯, W<sup>+</sup>W<sup>-</sup>, and Z/γ* →ττ production cross-sections in pp collisions at √s = 7 TeV with the ATLAS detector
title_short Simultaneous measurements of the tt¯, W<sup>+</sup>W<sup>-</sup>, and Z/γ* →ττ production cross-sections in pp collisions at √s = 7 TeV with the ATLAS detector
title_full Simultaneous measurements of the tt¯, W<sup>+</sup>W<sup>-</sup>, and Z/γ* →ττ production cross-sections in pp collisions at √s = 7 TeV with the ATLAS detector
title_fullStr Simultaneous measurements of the tt¯, W<sup>+</sup>W<sup>-</sup>, and Z/γ* →ττ production cross-sections in pp collisions at √s = 7 TeV with the ATLAS detector
title_full_unstemmed Simultaneous measurements of the tt¯, W<sup>+</sup>W<sup>-</sup>, and Z/γ* →ττ production cross-sections in pp collisions at √s = 7 TeV with the ATLAS detector
title_sort simultaneous measurements of the tt¯, w<sup>+</sup>w<sup>-</sup>, and z/γ* →ττ production cross-sections in pp collisions at √s = 7 tev with the atlas detector
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/86837
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