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Evidence for a bottom baryon resonance Λ*0b in CDF data

AuthorsAaltonen, T.; Casal, Bruno ; Cuevas, Javier ; Gómez, G. ; Palencia, Enrique ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Vilar, Rocío ; Vizán, J. ; CDF Collaboration
Issue Date2013
PublisherAmerican Physical Society
CitationPhysical Review D 88: 071101(R) (2013)
AbstractUsing 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. © 2013 American Physical Society.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevD.88.071101
Identifiersdoi: 10.1103/PhysRevD.88.071101
issn: 1550-7998
e-issn: 1550-2368
Appears in Collections:(IFCA) Artículos
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