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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/46567
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
Citation: Physical Review Letters 107(19): 191801 (2011)
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.
Publisher version (URL): http://dx.doi.org/10.1103/PhysRevLett.107.191801
URI: http://hdl.handle.net/10261/46567
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.107.191801
E-ISSN: 1079-7114
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