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Title: Observation and Mass Measurement of the Baryon Ξb-
Authors: 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
Keywords: Bottom baryons
Hadronic decays of baryons
Hadronic Collisions
Quark Production
Cross-section
High Energy Physics
Issue Date: 3-Aug-2007
Publisher: American Physical Society
Abstract: 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).
Description: 7 páginas, 2 figuras, 1 tabla.-- PACS nrs.: 14.20.Mr, 13.30.Eg, 13.60.Rj.-- CDF Collaboration: et al.
Publisher version (URL): http://dx.doi.org/10.1103/PhysRevLett.99.052002
URI: http://hdl.handle.net/10261/8530
ISSN: 0031-9007
???metadata.dc.identifier.doi???: 10.1103/PhysRevLett.99.052002
Citation: Physical Review Letters 99(5): 052002 (2007)
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