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Evidence for a bottom baryon resonance Lambda_b* in CDF data
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arxiv 1308.1760 v2 pith:QLI4GQJU submitted 2013-08-08 hep-ex
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Using data from proton-antiproton collisions at Ecms=1.96 TeV recorded by the CDF II detector at the Fermilab Tevatron, evidence for the excited resonance state Lambda_b* is presented in its Lambda_b0 pi+ pi- decay, followed by the Lambda_b0 -->Lambda_c+ (-->proton K- pi+) pi- decays. The analysis is based on a data sample corresponding to an integrated luminosity of 9.6/fb 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 3.5 Gaussian sigmas. The mass of the observed state is found to be 5919.22 +- 0.76 MeV in agreement with similar findings in proton-proton collision experiments.
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Strong decay properties of P-wave single bottom baryons of the SU(3) flavor antitriplet $\bf\bar 3_F$
hep-ph 2024-12 conditional novelty 5.0 of 10
A systematic light-cone sum-rule calculation of strong decays for P-wave bottom baryons finds eight narrow states, matching several observed resonances.
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