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Search for the decay B+-> K+tau(-/+)mu(+/-)
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BABAR Collaboration (Including: Harrison, P. F., Ilić, Jelena, Latham, Thomas and Mohanty, G. B.). (2007) Search for the decay B+-> K+tau(-/+)mu(+/-). Physical Review Letters, Volume 99 (Number 20). Article number 201801. doi:10.1103/PhysRevLett.99.201801 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.99.201801
Abstract
We present a search for the lepton flavor violating decay B+-> K+tau(-/+)mu(+/-) using 383x10(6) B (B) over bar events collected by the BABAR experiment. The branching fraction for this decay can be substantially enhanced in new physics models. The kinematics of the tau from the signal B decay are inferred from the K+, mu, and other B in the event, which is fully reconstructed in one of a variety of hadronic decay modes, allowing the signal B candidate to be fully reconstructed. We observe no excess of events over the expected background and set a limit of B(B+-> K+tau mu)< 7.7x10(-5) at 90% confidence level, where the branching fraction is for the sum of the K+tau(-)mu(+) and K+tau(+)mu(-) final states. We use this result to improve a model-independent bound on the energy scale of flavor-changing new physics.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review Letters | ||||
Publisher: | American Physical Society | ||||
ISSN: | 0031-9007 | ||||
Official Date: | 15 November 2007 | ||||
Dates: |
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Volume: | Volume 99 | ||||
Number: | Number 20 | ||||
Number of Pages: | 7 | ||||
Page Range: | Article number 201801 | ||||
DOI: | 10.1103/PhysRevLett.99.201801 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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