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Título : Observation and Mass Measurement of the Baryon Ξb-
Autor : Aaltonen, T., Ruiz Jimeno, Alberto, Chuang, S. H., Cuenca Almenar, Cristóbal, Gómez, G., Palencia, Enrique, Cuevas, Javier, Rodrigo, Teresa, Piedra, Jonatan, Cabrera, Susana, Scodellaro, Luca, Vila, Iván, Vilar, Rocío, Casal, Bruno
Palabras clave : Bottom baryons
Hadronic decays of baryons
Hadronic Collisions
Quark Production
Cross-section
High Energy Physics
Fecha de publicación : 3-Aug-2007
Editor: American Physical Society
Citación : Physical Review Letters 99(5): 052002 (2007)
Resumen: We report the observation and measurement of the mass of the bottom, strange baryon Ξ(-)(b) through the decay chain Ξ(-)(b)-->J/Ψ Ξ(-), where J/Ψ --> μ(+)μ(-), Ξ(-) --> Λπ(-), and Λ --> pπ(-). A signal is observed whose probability of arising from a background fluctuation is 6.6x10(-15), or 7.7 Gaussian standard deviations. The Ξ(-)(b) mass is measured to be 5792.9 ± 2.5(stat) ± 1.7(syst) MeV/c^(2).
Descripción : 7 páginas, 2 figuras, 1 tabla.-- PACS nrs.: 14.20.Mr, 13.30.Eg, 13.60.Rj.-- CDF Collaboration: et al.
Versión del editor: http://dx.doi.org/10.1103/PhysRevLett.99.052002
URI : http://hdl.handle.net/10261/8530
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.99.052002
Citación : Physical Review Letters 99(5): 052002 (2007)
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