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Abstract:

The final ATLAS Run 1 measurements of Higgs boson production and couplings in the decay channel H → ZZ∗ → l + l - l' + l' - , where l, l' = e or μ, are presented. These measurements were performed using pp collision data corresponding to integrated luminosities of 4.5 and 20.3 fb -1 at center-of-mass energies of 7 and 8 TeV, respectively, recorded with the ATLAS detector at the LHC. The H → ZZ∗ → 4l signal is observed with a significance of 8.1 standard deviations, with an expectation of 6.2 standard deviations, at m H = 125.36 GeV, the combined ATLAS measurement of the Higgs boson mass from the H → γγ and H → ZZ∗ → 4l channels. The production rate relative to the Standard Model expectation, the signal strength, is measured in four different production categories in the H → ZZ∗ → 4l channel. The measured signal strength, at this mass, and with all categories combined, is 1.44 +0.40 -0.33 . The signal strength for Higgs boson production in gluon fusion or in association with tt or bb pairs is found to be 1.7 +0.5 -0.4 , while the signal strength for vector-boson fusion combined with WH/ZH associated production is found to be 0.3 +1.6 -0.9 . © 2015 CERN, for the ATLAS Collaboration.

Registro:

Documento: Artículo
Título:Measurements of Higgs boson production and couplings in the four-lepton channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 2899 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2899 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2015
Volumen:91
Número:1
DOI: http://dx.doi.org/10.1103/PhysRevD.91.012006
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_n1_p_Aad

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Citas:

---------- APA ----------
(2015) . Measurements of Higgs boson production and couplings in the four-lepton channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector. Physical Review D - Particles, Fields, Gravitation and Cosmology, 91(1).
http://dx.doi.org/10.1103/PhysRevD.91.012006
---------- CHICAGO ----------
Aad, G. "Measurements of Higgs boson production and couplings in the four-lepton channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector" . Physical Review D - Particles, Fields, Gravitation and Cosmology 91, no. 1 (2015).
http://dx.doi.org/10.1103/PhysRevD.91.012006
---------- MLA ----------
Aad, G. "Measurements of Higgs boson production and couplings in the four-lepton channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector" . Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 91, no. 1, 2015.
http://dx.doi.org/10.1103/PhysRevD.91.012006
---------- VANCOUVER ----------
Aad, G. Measurements of Higgs boson production and couplings in the four-lepton channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector. Phys Rev D Part Fields Gravit Cosmol. 2015;91(1).
http://dx.doi.org/10.1103/PhysRevD.91.012006