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Título : Observation of the Ξb0 Baryon
Autor : 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.
Fecha de publicación : Sep-2011
Editor: American Physical Society
Citación : Physical Review Letters 107(10): 102001 (2011)
Resumen: 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-.
Descripción : 7 páginas, 2 figuras, 1 tabla.-- PACS numbers: 13.30.Eg, 13.60.Rj, 14.20.Mr.-- CDF Collaboration: et al.
Versión del editor: http://dx.doi.org/10.1103/PhysRevLett.107.102001
URI : http://hdl.handle.net/10261/46367
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.107.102001
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