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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/8529
Title: Observation of the heavy baryons Σ(b) and Σ(b)
Authors: Aaltonen, T.; Cabrera, Susana; Casal, Bruno; Chuang, S. H.; Rodrigo, Teresa; Ruiz Jimeno, Alberto; Cuenca Almenar, Cristóbal; Gómez, G.; Palencia, Enrique; Cuevas, Javier; Piedra, Jonatan; Scodellaro, Luca; Vila, Iván; Vilar, Rocío
Keywords: Bottom baryons
Hadronic decays of baryons
Potential Models
High Energy Physics
Issue Date: 12-Nov-2007
Publisher: American Physical Society
Citation: Physical Review Letters 99(20): 202001 (2007)
Abstract: We report an observation of new bottom baryons produced in p(p)over-bar collisions at the Tevatron. Using 1.1 fb(-1) of data collected by the CDF II detector, we observe four Λ(0)(b)π(±) resonances in the fully reconstructed decay mode Λ(0)(b)->Λ(+)(c)π(-), where Λ(+)(c)-> pK(-)π(+). We interpret these states as the Σ((*)±)(b) baryons and measure the following masses: m(Σb)(+)=5807.8(-2.2)(+2.0)(stat.) ± 1.7(syst.) MeV/c^(2), m(Σb)(-)=5815.2 ± 1.0(stat.)± 1.7(syst.) MeV/c^(2), and m(Σ(*)(b))-m(Σ(b))=21.2(-1.9)(+2.0)(stat.)(-0.3)(+0.4)(syst.) MeV/c^(2).
Description: 7 páginas, 2 figuras, 2 tablas.-- PACS nrs.: 14.20.Mr, 13.30.Eg.-- CDF Collaboration: et al.
Publisher version (URL): http://dx.doi.org/10.1103/PhysRevLett.99.202001
URI: http://hdl.handle.net/10261/8529
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.99.202001
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