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Abstract:

A measurement of the parity-violating decay asymmetry parameter, αb, and the helicity amplitudes for the decay Λb0→J/ψ(μ+μ-)Λ0(pπ-) is reported. The analysis is based on 1400 Λb0 and Λ¯b0 baryons selected in 4.6 fb-1 of proton-proton collision data with a center-of-mass energy of 7 TeV recorded by the ATLAS experiment at the LHC. By combining the Λb0 and Λ¯b0 samples under the assumption of CP conservation, the value of αb is measured to be 0.30±0.16(stat)±0.06(syst). This measurement provides a test of theoretical models based on perturbative QCD or heavy-quark effective theory. © 2014 CERN.

Registro:

Documento: Artículo
Título:Measurement of the parity-violating asymmetry parameter αb and the helicity amplitudes for the decay Λb0 →j /ψ Λ0 with the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 2898 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2898 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2014
Volumen:89
Número:9
DOI: http://dx.doi.org/10.1103/PhysRevD.89.092009
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_v89_n9_p_Aad

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Citas:

---------- APA ----------
(2014) . Measurement of the parity-violating asymmetry parameter αb and the helicity amplitudes for the decay Λb0 →j /ψ Λ0 with the ATLAS detector. Physical Review D - Particles, Fields, Gravitation and Cosmology, 89(9).
http://dx.doi.org/10.1103/PhysRevD.89.092009
---------- CHICAGO ----------
Aad, G. "Measurement of the parity-violating asymmetry parameter αb and the helicity amplitudes for the decay Λb0 →j /ψ Λ0 with the ATLAS detector" . Physical Review D - Particles, Fields, Gravitation and Cosmology 89, no. 9 (2014).
http://dx.doi.org/10.1103/PhysRevD.89.092009
---------- MLA ----------
Aad, G. "Measurement of the parity-violating asymmetry parameter αb and the helicity amplitudes for the decay Λb0 →j /ψ Λ0 with the ATLAS detector" . Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 89, no. 9, 2014.
http://dx.doi.org/10.1103/PhysRevD.89.092009
---------- VANCOUVER ----------
Aad, G. Measurement of the parity-violating asymmetry parameter αb and the helicity amplitudes for the decay Λb0 →j /ψ Λ0 with the ATLAS detector. Phys Rev D Part Fields Gravit Cosmol. 2014;89(9).
http://dx.doi.org/10.1103/PhysRevD.89.092009