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Open Access item Observation of Bs0→J/ψK*(892)0 and Bs0→J/ψKS0 decays

Authors: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.
Issue Date:Mar-2011
Publisher:American Physical Society
Citation:Physical Review D 83(5): 052012 (2011)
Abstract: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.
Description:11 páginas, 4 tablas, 3 tablas.-- PACS numbers: 14.40.Nd, 12.15.Ff, 12.15.Hh, 13.25.Hw.-- CDF Collaboration: et al.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevD.83.052012
E-ISSNmetadata.dc.identifier.doi = DOI:1550-2368
Appears in Collections:(IFCA) Artículos

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