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Observation of the Ξb0 Baryon

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Lister, Alison / Wu, Xin
Published in Physical Review Letters. 2011, vol. 107, no. 10, p. 102001
Abstract The observation of the bottom, strange baryon Ξ0b through the decay chain Ξ0b→Ξ+cπ−, where Ξ+c→Ξ−π+π+, Ξ−→Λπ−, and Λ→pπ−, is reported by using data corresponding to an integrated luminosity of 4.2  fb−1 from pp collisions at s√=1.96  TeV recorded with the Collider Detector at Fermilab. A signal of 25.3+5.6−5.4 candidates is observed whose probability of arising from a background fluctuation is 3.6×10−12, corresponding to 6.8 Gaussian standard deviations. The Ξ0b mass is measured to be 5787.8±5.0(stat)±1.3(syst)  MeV/c2. In addition, the Ξ−b baryon is observed through the process Ξ−b→Ξ0cπ−, where Ξ0c→Ξ−π+, Ξ−→Λπ−, and Λ→pπ−.
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CDF COLLABORATION. Observation of the Ξb0 Baryon. In: Physical Review Letters, 2011, vol. 107, n° 10, p. 102001. https://archive-ouverte.unige.ch/unige:38755

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Deposited on : 2014-07-21

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