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Open Access item Observation of the Ξb0 Baryon

Authors:Aaltonen, T.
Álvarez González, B.
Casal, Bruno
Cuevas, Javier
Gómez, G.
Palencia, Enrique
Rodrigo, Teresa
Ruiz Jimeno, Alberto
Scodellaro, Luca
Vila, Iván
Vilar, Rocío
Vizán, J.
Issue Date:Sep-2011
Publisher:American Physical Society
Citation:Physical Review Letters 107(10): 102001 (2011)
Abstract:The observation of the bottom, strange baryon Ξb0 through the decay chain Ξb0→Ξc+π-, where Ξc+→Ξ-π+π+, Ξ-→Λπ-, and Λ→pπ-, is reported by using data corresponding to an integrated luminosity of 4.2  fb-1 from pp̅ collisions at √s=1.96  TeV recorded with the Collider Detector at Fermilab. A signal of 25.3-5.4+5.6 candidates is observed whose probability of arising from a background fluctuation is 3.6×10-12, corresponding to 6.8 Gaussian standard deviations. The Ξb0 mass is measured to be 5787.8±5.0(stat)±1.3(syst)  MeV/c2. In addition, the Ξb- baryon is observed through the process Ξb-→Ξc0π-, where Ξc0→Ξ-π+, Ξ-→Λπ-, and Λ→pπ-.
Description:7 páginas, 2 figuras, 1 tabla.-- PACS numbers: 13.30.Eg, 13.60.Rj, 14.20.Mr.-- CDF Collaboration: et al.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevLett.107.102001
E-ISSNmetadata.dc.identifier.doi = DOI:1079-7114
Appears in Collections:(IFCA) Artículos

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