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Journal Articles Physical Review Letters Year : 2011

Search for Bs0→μ+μ- and B0→μ+μ- Decays with CDF II

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T. Aaltonen
  • Function : Author
B. Álvarez González
  • Function : Author
S. Amerio
  • Function : Author
D. Amidei
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A. Anastassov
  • Function : Author
A. Annovi
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J. Antos
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G. Apollinari
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J. A. Appel
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A. Apresyan
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T. Arisawa
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A. Artikov
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J. Asaadi
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W. Ashmanskas
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B. Auerbach
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A. Aurisano
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F. Azfar
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W. Badgett
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A. Barbaro-Galtieri
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V. E. Barnes
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B. A. Barnett
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P. Barria
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P. Bartos
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M. Bauce
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G. Bauer
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F. Bedeschi
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D. Beecher
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S. Behari
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G. Bellettini
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J. Bellinger
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D. Benjamin
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Abstract

A search has been performed for Bs0→μ+μ- and B0→μ+μ- decays using 7fb-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.

Dates and versions

in2p3-00618367 , version 1 (01-09-2011)

Identifiers

Cite

T. Aaltonen, B. Álvarez González, S. Amerio, D. Amidei, A. Anastassov, et al.. Search for Bs0→μ+μ- and B0→μ+μ- Decays with CDF II. Physical Review Letters, 2011, 107, pp.191801. ⟨10.1103/PhysRevLett.107.191801⟩. ⟨in2p3-00618367⟩
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