Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/140117
Title: | Search for the Rare Decay B→πl+l− |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 30-Jul-2007 |
Publisher: | American Physical Society |
Abstract: | We have performed a search for the flavor-changing neutral-current decays B → π ℓ + ℓ − , where ℓ + ℓ − is either e + e − or μ + μ − , using a sample of 230 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector. We observe no evidence of a signal and measure the upper limit on the isospin-averaged branching fraction to be B ( B → π ℓ + ℓ − ) < 9.1 × 10 − 8 at 90% confidence level. We also search for the lepton-flavor-violating decays B → π e ± μ ∓ and measure an upper limit on the isospin-averaged branching fraction of B ( B → π e ± μ ∓ ) < 9.2 × 10 − 8 at 90% confidence level. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.99.051801 |
It is part of: | Physical Review Letters, 2007, vol. 99, num. 5, p. 051801 |
URI: | http://hdl.handle.net/2445/140117 |
Related resource: | https://doi.org/10.1103/PhysRevLett.99.051801 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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