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Abstract:

An observation of the Λ b 0 →ψ(2S)Λ 0 decay and a comparison of its branching fraction with that of the Λ b 0 →J/ψΛ 0 decay has been made with the ATLAS detector in proton–proton collisions at s=8 TeV at the LHC using an integrated luminosity of 20.6 fb −1 . The J/ψ and ψ(2S) mesons are reconstructed in their decays to a muon pair, while the Λ 0 →pπ − decay is exploited for the Λ 0 baryon reconstruction. The Λ b 0 baryons are reconstructed with transverse momentum p T >10 GeV and pseudorapidity |η|<2.1. The measured branching ratio of the Λ b 0 →ψ(2S)Λ 0 and Λ b 0 →J/ψΛ 0 decays is Γ(Λ b 0 →ψ(2S)Λ 0 )/Γ(Λ b 0 →J/ψΛ 0 )=0.501±0.033(stat)±0.019(syst), lower than the expectation from the covariant quark model. © 2015 CERN for the benefit of the ATLAS Collaboration

Registro:

Documento: Artículo
Título:Measurement of the branching ratio Γ(Λ b 0 →ψ(2S)Λ 0 )/Γ(Λ b 0 →J/ψΛ 0 ) with the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 2857 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2857 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2015
Volumen:751
Página de inicio:63
Página de fin:80
DOI: http://dx.doi.org/10.1016/j.physletb.2015.10.009
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_v751_n_p63_Aad

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Citas:

---------- APA ----------
(2015) . Measurement of the branching ratio Γ(Λ b 0 →ψ(2S)Λ 0 )/Γ(Λ b 0 →J/ψΛ 0 ) with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 751, 63-80.
http://dx.doi.org/10.1016/j.physletb.2015.10.009
---------- CHICAGO ----------
Aad, G. "Measurement of the branching ratio Γ(Λ b 0 →ψ(2S)Λ 0 )/Γ(Λ b 0 →J/ψΛ 0 ) with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 751 (2015) : 63-80.
http://dx.doi.org/10.1016/j.physletb.2015.10.009
---------- MLA ----------
Aad, G. "Measurement of the branching ratio Γ(Λ b 0 →ψ(2S)Λ 0 )/Γ(Λ b 0 →J/ψΛ 0 ) with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 751, 2015, pp. 63-80.
http://dx.doi.org/10.1016/j.physletb.2015.10.009
---------- VANCOUVER ----------
Aad, G. Measurement of the branching ratio Γ(Λ b 0 →ψ(2S)Λ 0 )/Γ(Λ b 0 →J/ψΛ 0 ) with the ATLAS detector. Phys Lett Sect B Nucl Elem Part High-Energy Phys. 2015;751:63-80.
http://dx.doi.org/10.1016/j.physletb.2015.10.009