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Title: Search for Bs0→μ+μ- and B0→μ+μ- Decays with CDF II
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: Nov-2011
Publisher: American Physical Society
Abstract: A search has been performed for Bs0→μ+μ- and B0→μ+μ- decays using 7  fb-1 of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. The observed number of B0 candidates is consistent with background-only expectations and yields an upper limit on the branching fraction of B(B0→μ+μ-)<6.0×10-9 at 95% confidence level. We observe an excess of Bs0 candidates. The probability that the background processes alone could produce such an excess or larger is 0.27%. The probability that the combination of background and the expected standard model rate of Bs0→μ+μ- could produce such an excess or larger is 1.9%. These data are used to determine B(Bs0→μ+μ-)= (1.8-0.9+1.1)×10-8 and provide an upper limit of B(Bs0→μ+μ-)<4.0×10-8 at 95% confidence level.
Description: 7 páginas, 1 figura.-- PACS numbers: 13.20.He, 12.15.Mm, 12.60.Jv.-- CDF Collaboration: et al.
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ISSN: 0031-9007
???metadata.dc.identifier.doi???: 10.1103/PhysRevLett.107.191801
Citation: Physical Review Letters 107(19): 191801 (2011)
Appears in Collections:(IFCA) Artículos
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