Towards an assessment of the ATLAS data on the branching ratio Gamma(Lambdab(0) -> psi(2S) Lambda(0))/Gamma(Lambdab(0) -> J/psi Lambda(0))
Abstract
Recently the ATLAS Collaboration at CERN reported on the measurement of the branching ratio R(Lambdab) = Gamma(Lambdab(0) -> psi(2S) Lambda(0))/Gamma(Lambdab(0) -> J/psi Lambda(0)). The measured branching ratio R(Lambdab) = 0.501 pm 0.033$ (stat) pm 0.019 (syst) was found to be lower than the covariant quark model prediction of R(Lambdab) = 0.8 pm 0.1 calculated by us recently. We present a detailed analysis of the branching ratio R(Lambdab) using a model-independent framework for the heavy-to-light form factors based on results from our previos papers.
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