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| Title: | Search for the rare decay B -> πl(+)l(-) |
Authors: | Aubert, B.; Garra Tico, J.; Grauges, E.; Azzolini, Virginia; López-March, Neus CSIC; Martínez-Vidal, Fernando CSIC ORCID; Milanés, Diego A. CSIC; Oyanguren, Arantza CSIC ORCID; Babar Collaboration | Keywords: | Quark model B mesons Isotopic spin (elementary particles) Meson decay Neutral currents Semileptonic decays |
Issue Date: | 30-Jul-2007 | Publisher: | American Physical Society | Citation: | Physical Review Letters 99(5): 051801 (2007) | Abstract: | We have performed a search for the flavor-changing neutral-current decays B -> πl(+)l(-), where l(+)l(-) is either e(+)e(-) or μ(+)μ(-), using a sample of 230x10(6) Υ(4S)-->B[overline 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 -> πl(+)l(-)) < 9.1 x 10(-8) at 90% confidence level. We also search for the lepton-flavor-violating decays B-->πe(±)mu(±) and measure an upper limit on the isospin-averaged branching fraction of B(B-->πe(±)mu(±)) < 9.2 x 10(-8) at 90% confidence level. | Description: | 7 pages, 1 figure, 2 tables.-- PACS nrs.: 13.20.He.-- ISI Article Identifier: 000248597500008.-- et al.(BABAR Collaboration).-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ex/0703018 | Publisher version (URL): | http://dx.doi.org/10.1103/PhysRevLett.99.051801 | URI: | http://hdl.handle.net/10261/9895 | DOI: | 10.1103/PhysRevLett.99.051801 | ISSN: | 0031-9007 |
| Appears in Collections: | (IFIC) Artículos |
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| Aubert_et_al_PRD_99_051801_2007.pdf | 202,79 kB | Adobe PDF |  View/Open |
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