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Abstract:

The cross section of a top-quark pair produced in association with a photon is measured in proton-proton collisions at a centre-of-mass energy of s=8 TeV with 20.2 fb −1 of data collected by the ATLAS detector at the Large Hadron Collider in 2012. The measurement is performed by selecting events that contain a photon with transverse momentum p T > 15 GeV, an isolated lepton with large transverse momentum, large missing transverse momentum, and at least four jets, where at least one is identified as originating from a b-quark. The production cross section is measured in a fiducial region close to the selection requirements. It is found to be 139 ± 7 (stat.) ± 17 (syst.) fb, in good agreement with the theoretical prediction at next-to-leading order of 151 ± 24 fb. In addition, differential cross sections in the fiducial region are measured as a function of the transverse momentum and pseudorapidity of the photon.[Figure not available: see fulltext.]. © 2017, The Author(s).

Registro:

Documento: Artículo
Título:Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector
Autor:The ATLAS collaboration et al.
Este artículo contiene 2874 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2874 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:Hadron-Hadron scattering (experiments); Top physics
Año:2017
Volumen:2017
Número:11
DOI: http://dx.doi.org/10.1007/JHEP11(2017)086
Título revista:Journal of High Energy Physics
Título revista abreviado:J. High Energy Phys.
ISSN:11266708
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2017_n11_p_TheATLAScollaboration

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Citas:

---------- APA ----------
(2017) . Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector. Journal of High Energy Physics, 2017(11).
http://dx.doi.org/10.1007/JHEP11(2017)086
---------- CHICAGO ----------
The ATLAS collaboration. "Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector" . Journal of High Energy Physics 2017, no. 11 (2017).
http://dx.doi.org/10.1007/JHEP11(2017)086
---------- MLA ----------
The ATLAS collaboration. "Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector" . Journal of High Energy Physics, vol. 2017, no. 11, 2017.
http://dx.doi.org/10.1007/JHEP11(2017)086
---------- VANCOUVER ----------
The ATLAS collaboration. Measurement of the tt¯ γ production cross section in proton-proton collisions at √s=8 TeV with the ATLAS detector. J. High Energy Phys. 2017;2017(11).
http://dx.doi.org/10.1007/JHEP11(2017)086