Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/140219
Title: | Search for the Decay B+→K+τ∓μ± |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 15-Nov-2007 |
Publisher: | American Physical Society |
Abstract: | We present a search for the lepton flavor violating decay B + → K + τ ∓ μ ± using 383 × 10 6 B ¯¯¯ B 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 + , μ , 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 + τ μ ) < 7.7 × 10 − 5 at 90% confidence level, where the branching fraction is for the sum of the K + τ − μ + and K + τ + μ − final states. We use this result to improve a model-independent bound on the energy scale of flavor-changing new physics. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.99.201801 |
It is part of: | Physical Review Letters, 2007, vol. 99, num. 20, p. 201801 |
URI: | http://hdl.handle.net/2445/140219 |
Related resource: | https://doi.org/10.1103/PhysRevLett.99.201801 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
558178.pdf | 181.69 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.