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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, Martínez-Vidal, Fernando, Milanés, Diego A., Oyanguren, Arantza, 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
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:
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ISSN: 0031-9007
???metadata.dc.identifier.doi???: 10.1103/PhysRevLett.99.051801
Citation: Physical Review Letters 99(5): 051801 (2007)
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