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

Thomas Gutsche, Mikhail A. Ivanov, Jürgen G. Körner, Valery E. Lyubovitskij, Pietro Santorelli

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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.

Original languageEnglish
Article number114008
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume92
Issue number11
DOIs
Publication statusPublished - 1 Dec 2015

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quark models
form factors
predictions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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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.

Research output: Contribution to journalArticle

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