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 Λb*0 is presented in its Λb0π -π+ decay followed by the Λb0→Λ c+π- and Λc+→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. © 2013 American Physical Society.
|Digital Object Identifier (DOI):||10.1103/PhysRevD.88.071101|
|Codice identificativo ISI:||WOS:000325169600001|
|Codice identificativo Scopus:||2-s2.0-84885392561|
|Titolo:||Evidence for a bottom baryon resonance Λb*0 in CDF data|
|Appare nelle tipologie:||1.1 Articolo in rivista|