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

T. Aaltonen et al. (CDF Collaboration)
Phys. Rev. D 88, 071101(R) – Published 1 October 2013

Abstract

Using data from proton-antiproton collisions at s=1.96TeV recorded by the CDF II detector at the Fermilab Tevatron, evidence for the excited resonance state Λb*0 is presented in its Λb0ππ+ decay followed by the Λb0Λc+π and Λc+pKπ+ decays. The analysis is based on a data sample corresponding to an integrated luminosity of 9.6fb1 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±0.76MeV/c2 in agreement with similar findings in proton-proton collision experiments.

  • Figure
  • Figure
  • Received 12 August 2013

DOI:https://doi.org/10.1103/PhysRevD.88.071101

© 2013 American Physical Society

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Vol. 88, Iss. 7 — 1 October 2013

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