We report an observation of new bottom baryons produced in pp[over ] collisions at the Tevatron. Using 1.1 fb;{-1} of data collected by the CDF II detector, we observe four Lambda_{b};{0}pi;{+/-} resonances in the fully reconstructed decay mode Lambda_{b};{0}-->Lambda_{c};{+}pi;{-}, where Lambda_{c};{+}-->pK;{-}pi;{+}. We interpret these states as the Sigma_{b};{(*)+/-} baryons and measure the following masses: m_{Sigma_{b};{+}}=5807.8_{-2.2};{+2.0}(stat.)+/-1.7(syst.) MeV/c;{2}, m_{Sigma_{b};{-}}=5815.2+/-1.0(stat.)+/-1.7(syst.) MeV/c;{2}, and m(Sigma_{b};{*})-m(Sigma_{b})=21.2_{-1.9};{+2.0}(stat.)-0.3+0.4(syst.) MeV/c;{2}.
Observation of the Heavy Baryons Sigma_{b} and Sigma_{b};{*}. Publishing Authors By Initials
Observation of the Heavy Baryons Sigma_{b} and Sigma_{b};{*}. Journal Published:
PUBLICATION TYPE: Journal Article
Journal: Physical review letters
VOLUME: 99
Page Numbers: 202001
Journal Abbreviation: Phys. Rev. Lett.
ISSN: 0031-9007
DAY: 12
MONTH: 11
YEAR: 2007
Observation of the Heavy Baryons Sigma_{b} and Sigma_{b};{*}. Information
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LANGUAGE: eng
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AFFILIATION: Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki, Finland.
Country: United States
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MEDLINETA: Phys Rev Lett
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