Aubert, B;
Bona, M;
Boutigny, D;
Karyotakis, Y;
Lees, JP;
Poireau, V;
Prudent, X;
... BABAR Collaboration, The; + view all
(2007)
Search for the Decay B+-->K+ tau-/+ mu+/-.
Physical Review Letters
, 99
(20)
, Article 201801. 10.1103/PhysRevLett.99.201801.
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Abstract
We present a search for the lepton flavor violating decay B+-->K+ tau-/+ mu+/- using 383 x 10;{6} BB[over ] 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)<7.7 x 10(-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.
| Type: | Article |
|---|---|
| Title: | Search for the Decay B+-->K+ tau-/+ mu+/-. |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.99.201801 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.99.201801 |
| Language: | English |
| Additional information: | © 2007 The American Physical Society |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1374175 |
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