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Título : Observation of Bs0→J/ψK*(892)0 and Bs0→J/ψKS0 decays
Autor : Aaltonen, T., Álvarez González, B., Casal, Bruno, Cuevas, Javier, Gómez, G., Palencia, Enrique, Rodrigo, Teresa, Ruiz Jimeno, Alberto, Scodellaro, Luca, Vila, Iván, Vilar, Rocío, Vizán, J.
Fecha de publicación : Mar-2011
Editor: American Physical Society
Citación : Physical Review D 83(5): 052012 (2011)
Resumen: We report the first observation of two Cabibbo-suppressed decay modes of the Bs0 meson. Using a sample of pp̅ collisions at √s=1.96  TeV corresponding to 5.9  fb-1 of integrated luminosity collected with the CDF II, the collider detector at the Fermilab Tevatron, we search for new Bs0 decay modes in a sample of events containing J/ψ→μ+μ- decays. We reconstruct a Bs0→J/ψK*(892)0 signal with K*(892)0→K+π-, observing a yield of 151±25 events with a statistical significance of 8.0σ. We also reconstruct a Bs0→J/ψKS0 signal with KS0→π+π-, observing a yield of 64±14 events with a statistical significance of 7.2σ. From these yields, we extract the branching ratios B(Bs0→J/ψK*(892)0)=(8.3±3.8)×10-5 and B(Bs0→J/ψK0)=(3.5±0.8)×10-5, where statistical, systematic, and fragmentation-fraction uncertainties are included in the combined uncertainty.
Descripción : 11 páginas, 4 tablas, 3 tablas.-- PACS numbers: 14.40.Nd, 12.15.Ff, 12.15.Hh, 13.25.Hw.-- CDF Collaboration: et al.
Versión del editor: http://dx.doi.org/10.1103/PhysRevD.83.052012
URI : http://hdl.handle.net/10261/46365
ISSN: 1550-7998
DOI: 10.1103/PhysRevD.83.052012
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