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Abstract:

Simultaneous measurements of the tt¯, W+W-, and Z/γ∗→ττ production cross-sections using an integrated luminosity of 4.6 fb-1 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±2.8-9.5+9.7±3.3±3.3 pb, σ(W+W-)=53.3±2.7-8.0+7.3±1.0±0.5 pb, and σ(Z/γ∗→ττ)=1174±24-87+72±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+W-. © 2015 CERN. © 2015 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the «http://creativecommons.org/licenses/by/3.0/» Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Registro:

Documento: Artículo
Título:Simultaneous measurements of the tt¯, W+W-, and Z/γ∗ →ττ production cross-sections in pp collisions at √s =7 TeV with the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 2884 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2884 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2015
Volumen:91
Número:5
DOI: http://dx.doi.org/10.1103/PhysRevD.91.052005
Título revista:Physical Review D - Particles, Fields, Gravitation and Cosmology
Título revista abreviado:Phys Rev D Part Fields Gravit Cosmol
ISSN:15507998
CODEN:PRVDA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v91_n5_p_Aad

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Citas:

---------- APA ----------
(2015) . Simultaneous measurements of the tt¯, W+W-, and Z/γ∗ →ττ production cross-sections in pp collisions at √s =7 TeV with the ATLAS detector. Physical Review D - Particles, Fields, Gravitation and Cosmology, 91(5).
http://dx.doi.org/10.1103/PhysRevD.91.052005
---------- CHICAGO ----------
Aad, G. "Simultaneous measurements of the tt¯, W+W-, and Z/γ∗ →ττ production cross-sections in pp collisions at √s =7 TeV with the ATLAS detector" . Physical Review D - Particles, Fields, Gravitation and Cosmology 91, no. 5 (2015).
http://dx.doi.org/10.1103/PhysRevD.91.052005
---------- MLA ----------
Aad, G. "Simultaneous measurements of the tt¯, W+W-, and Z/γ∗ →ττ production cross-sections in pp collisions at √s =7 TeV with the ATLAS detector" . Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 91, no. 5, 2015.
http://dx.doi.org/10.1103/PhysRevD.91.052005
---------- VANCOUVER ----------
Aad, G. Simultaneous measurements of the tt¯, W+W-, and Z/γ∗ →ττ production cross-sections in pp collisions at √s =7 TeV with the ATLAS detector. Phys Rev D Part Fields Gravit Cosmol. 2015;91(5).
http://dx.doi.org/10.1103/PhysRevD.91.052005