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| Title: | Observation of the heavy baryons Σ(b) and Σ(b) |
Authors: | Aaltonen, T.; Cabrera, Susana CSIC ORCID; Casal, Bruno CSIC; Chuang, S. H. CSIC; Rodrigo, Teresa CSIC ORCID ; Ruiz Jimeno, Alberto ; Cuenca Almenar, Cristóbal CSIC; Gómez, G. CSIC ORCID ; Palencia, Enrique CSIC ORCID; Cuevas, Javier CSIC ORCID; Piedra, Jonatan CSIC ORCID ; Scodellaro, Luca CSIC ORCID ; Vila, Iván CSIC ORCID; Vilar, Rocío CSIC ORCID | Keywords: | Bottom baryons Hadronic decays of baryons Potential Models Masses Quark Spectroscopy 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 | DOI: | 10.1103/PhysRevLett.99.202001 | ISSN: | 0031-9007 |
| Appears in Collections: | (IFCA) Artículos (IFIC) Artículos |
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| e202001.pdf | 251,28 kB | Adobe PDF |  View/Open |
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