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Abstract:

The four-lepton (4ℓ, ℓ=e,μ) production cross section is measured in the mass range from 80 to 1000 GeV using 20.3 fb −1 of data in pp collisions at s=8 TeV collected with the ATLAS detector at the LHC. The 4ℓ events are produced in the decays of resonant Z and Higgs bosons and the non-resonant ZZ continuum originating from qq¯, gg, and qg initial states. A total of 476 signal candidate events are observed with a background expectation of 26.2±3.6 events, enabling the measurement of the integrated cross section and the differential cross section as a function of the invariant mass and transverse momentum of the four-lepton system. In the mass range above 180 GeV, assuming the theoretical constraint on the qq¯ production cross section calculated with perturbative NNLO QCD and NLO electroweak corrections, the signal strength of the gluon-fusion component relative to its leading-order prediction is determined to be μ gg =2.4±1.0 (stat.)±0.5 (syst.)±0.8 (theory). © 2015 CERN for the benefit of the ATLAS Collaboration

Registro:

Documento: Artículo
Título:Measurements of four-lepton production in pp collisions at √s=8 TeV with the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 2865 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2865 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2016
Volumen:753
Página de inicio:552
Página de fin:572
DOI: http://dx.doi.org/10.1016/j.physletb.2015.12.048
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_v753_n_p552_Aad

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Citas:

---------- APA ----------
(2016) . Measurements of four-lepton production in pp collisions at √s=8 TeV with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 753, 552-572.
http://dx.doi.org/10.1016/j.physletb.2015.12.048
---------- CHICAGO ----------
Aad, G. "Measurements of four-lepton production in pp collisions at √s=8 TeV with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 753 (2016) : 552-572.
http://dx.doi.org/10.1016/j.physletb.2015.12.048
---------- MLA ----------
Aad, G. "Measurements of four-lepton production in pp collisions at √s=8 TeV with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 753, 2016, pp. 552-572.
http://dx.doi.org/10.1016/j.physletb.2015.12.048
---------- VANCOUVER ----------
Aad, G. Measurements of four-lepton production in pp collisions at √s=8 TeV with the ATLAS detector. Phys Lett Sect B Nucl Elem Part High-Energy Phys. 2016;753:552-572.
http://dx.doi.org/10.1016/j.physletb.2015.12.048