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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 |
| 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 |
| Appears in Collections: | (IFCA) Artículos (IFIC) Artículos |
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| e052002.pdf | 177,48 kB | Adobe PDF |  View/Open |
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