Evidence for a bottom baryon resonance Λ[*0 over b] in CDF data
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 Λ[*0 over b] is presented in its Λ[0 over b]π[superscript −]π[superscript +] decay followed by the Λ[0 over b] → Λ[+ over c]π[superscript...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/84697 https://orcid.org/0000-0002-6047-4211 |
| Summary: | 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 Λ[*0 over b] is presented in its Λ[0 over b]π[superscript −]π[superscript +] decay followed by the Λ[0 over b] → Λ[+ over c]π[superscript −] and Λ[+ over c] → pK[superscript −]π[superscript +] decays. The analysis is based on a data sample corresponding to an integrated luminosity of 9.6 fb[superscript −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/c[superscript 2] in agreement with similar findings in proton-proton collision experiments. |
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