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Observation and Mass Measurement of the Baryon Ξb-

AuthorsAaltonen, 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
KeywordsBottom baryons
Hadronic decays of baryons
Hadronic Collisions
Quark Production
High Energy Physics
Issue Date3-Aug-2007
PublisherAmerican Physical Society
CitationPhysical Review Letters 99(5): 052002 (2007)
AbstractWe 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).
Description7 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
Appears in Collections:(IFCA) Artículos
(IFIC) Artículos
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