Towards an assessment of the ATLAS data on the branching ratio Γ (Λb0 →ψ (2S) Λ0) / Γ (Λb0 →j /ψ Λ0)

Abstract

Recently the ATLAS Collaboration at CERN reported on the measurement of the branching ratio RΛb=Γ(Λb0→ψ(2S)Λ0)/Γ(Λb0→J/ψΛ0). The measured branching ratio RΛb=0.501±0.033(stat)±0.019(syst) was found to be lower than the covariant quark model prediction of RΛb=0.8±0.1 calculated by us recently. We present a detailed analysis of the branching ratio RΛb using a model-independent framework for the heavy-to-light form factors based on results from our previous papers.

Original language	English
Article number	114008
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	92
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.92.114008
Publication status	Published - 1 Dec 2015

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevD.92.114008

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Towards an assessment of the ATLAS data on the branching ratio Γ (Λb0 →ψ (2S) Λ0) / Γ (Λb0 →j /ψ Λ0). / Gutsche, Thomas; Ivanov, Mikhail A.; Körner, Jürgen G.; Lyubovitskij, Valery E.; Santorelli, Pietro.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 92, No. 11, 114008, 01.12.2015.

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abstract = "Recently the ATLAS Collaboration at CERN reported on the measurement of the branching ratio RΛb=Γ(Λb0→ψ(2S)Λ0)/Γ(Λb0→J/ψΛ0). The measured branching ratio RΛb=0.501±0.033(stat)±0.019(syst) was found to be lower than the covariant quark model prediction of RΛb=0.8±0.1 calculated by us recently. We present a detailed analysis of the branching ratio RΛb using a model-independent framework for the heavy-to-light form factors based on results from our previous papers.",

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AU - Gutsche, Thomas

AU - Ivanov, Mikhail A.

AU - Körner, Jürgen G.

AU - Lyubovitskij, Valery E.

AU - Santorelli, Pietro

PY - 2015/12/1

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