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Título: | Evidence for a Narrow Near-Threshold Structure in the J/psi phi Mass Spectrum in B+ -> J/psi phi K+ Decays |
Autor: | CDF Collaboration; Cabrera, Susana CSIC ORCID; Cuenca Almenar, Cristóbal CSIC; Álvarez González, B.; Casal, Bruno CSIC; Cuevas, Javier CSIC ORCID; Gómez, Gervasio CSIC ORCID ; Rodrigo, Teresa CSIC ORCID ; Ruiz Jimeno, Alberto CSIC ORCID ; Scodellaro, Luca CSIC ORCID ; Vila, Iván CSIC ORCID; Vilar Cortabitarte, R. CSIC ORCID; Aaltonen, T. | Fecha de publicación: | 19-jun-2009 | Editor: | American Physical Society | Citación: | Physical Review Letters 102 (24): 242002 (2009) | Resumen: | Evidence is reported for a narrow structure near the J/psi phi threshold in exclusive B+ -> J/psi phi K+ decays produced in (p) over barp collisions at root s = 1.96 TeV. A signal of 14 +/- 5 events, with statistical significance in excess of 3.8 standard deviations, is observed in a data sample corresponding to an integrated luminosity of 2.7 fb(-1), collected by the CDF II detector. The mass and natural width of the structure are measured to be 4143.0 +/- 2.9(stat) +/- 1.2(syst) MeV/c(2) and 11.7(-5.0)(+8.3)(stat) +/- 3.7(stat) Mev/c(2). | Versión del editor: | http://dx.doi.org/ 10.1103/PhysRevLett.102.242002 | URI: | http://hdl.handle.net/10261/22154 | DOI: | 10.1103/PhysRevLett.102.242002 | ISSN: | 0031-9007 |
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evidence for a narrow.pdf | 350,32 kB | Adobe PDF | Visualizar/Abrir |
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