Speaker
Mr
Prabhakar Palni
(on behalf of the CDF collaboration)
Description
Using data from proton-antiproton collisions at center of mass energy of 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 fully reconstructed decay mode to Lambda_b0 pi+ pi- where Lambda_b0 decays to Lambda_c+ pi- with Lambda_c+ decays to p K- pi+. 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-particles’ tracks displaced from the proton-antiproton interaction point. The significance of the observed signal is 3.5 sigma. The mass of the observed state is found to be 5919.22 ± 0.35 (stat) ± 0.30 (syst) ± 0.70 (PDG) MeV/c^2 in agreement with similar findings in proton-proton collisions experiments.
| APS member ID | 61112252 |
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Primary author
Mr
Prabhakar Palni
(on behalf of the CDF collaboration)
