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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/8530
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
High Energy Physics
Issue Date: 3-Aug-2007
Publisher: American Physical Society
Citation: Physical Review Letters 99(5): 052002 (2007)
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
DOI: 10.1103/PhysRevLett.99.052002
ISSN: 0031-9007
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