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Evidence for a bottom baryon resonance Λb*0 in CDF data

CollaborationWith : Clark, Allan Geoffrey / Lister, Alison / Wu, Xin
Published in Physical Review. D. 2013, vol. 88, no. 07, p. 071101
Abstract Using data from proton-antiproton collisions at s√=1.96  TeV recorded by the CDF II detector at the Fermilab Tevatron, evidence for the excited resonance state Λ*0b is presented in its Λ0bπ−π+ decay followed by the Λ0b→Λ+cπ− and Λ+c→pK−π+ decays. The analysis is based on a data sample corresponding to an integrated luminosity of 9.6  fb−1 collected by an online event selection based on charged-particle tracks displaced from the proton-antiproton interaction point. The significance of the observed signal is 3.5σ. The mass of the observed state is found to be 5919.22±0.76  MeV/c2 in agreement with similar findings in proton-proton collision experiments.
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CDF COLLABORATION. Evidence for a bottom baryon resonance Λb*0 in CDF data. In: Physical Review. D, 2013, vol. 88, n° 07, p. 071101. https://archive-ouverte.unige.ch/unige:38822

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Deposited on : 2014-07-22

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