Search For the Lepton-Flavor Violating Decays Y(3S)-]e Tau and Y(3S)-]mu Tau
Search For the Lepton-Flavor Violating Decays Y(3S)-]e Tau and Y(3S)-]mu Tau

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Published: 2008

Total Pages: 15

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Charged lepton-flavor violating processes are extremely rare in the Standard Model, but they are predicted to occur in several beyond-the-Standard Model theories, including Supersymmetry or models with leptoquarks or compositeness. We present a search for such processes in a sample of 117 x 106 [Upsilon](3S) decays recorded with the BABAR detector. We place upper limits on the branching fractions BF([Upsilon](3S) 2!e{sup {+-}}[tau]{sup {-+}})

Search for Lepton Flavor Violation in the Decays Tau-]e Gamma and Tau-]mu Gamma
Search for Lepton Flavor Violation in the Decays Tau-]e Gamma and Tau-]mu Gamma

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Published: 2010

Total Pages: 7

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Searches for lepton-flavor-violating decays of a [tau] lepton to a lighter mass lepton and a photon have been performed with the entire dataset of (963 ± 7) x 106 [tau] decays collected by the BABAR detector near the [Upsilon](4S), [Upsilon](3S) and [Upsilon](2S) resonances. The searches yield no evidence of signals and they set upper limits on the branching fractions of [Beta]([tau]{sup {+-}} 2!e{sup {+-}}[gamma])

Search for Lepton Flavor Violating Decays Tau to L \omega (l
Search for Lepton Flavor Violating Decays Tau to L \omega (l

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Published: 2007

Total Pages: 7

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A search for lepton flavor violating decays of a [tau] to a lighter-mass charged lepton and an [omega] vector meson is performed using 384.1 fb−1 of ee− annihilation data collected with the BABAR detector at the Stanford Linear Accelerator Center PEP-II storage ring. No signal is found, and the upper limits on the branching ratios are determined to be [beta]([tau]{sup {+-}} 2!e{sup {+-}}[omega])

Searches for Lepton Flavor Violation in the Decays Tau+- ---] E+- Gamma and Tau+- ---] Mu+- Gamma
Searches for Lepton Flavor Violation in the Decays Tau+- ---] E+- Gamma and Tau+- ---] Mu+- Gamma

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Published: 2010

Total Pages: 7

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Searches for lepton-flavor-violating decays of a? lepton to a lighter mass lepton and a photon have been performed with the entire dataset of (963 ± 7) x 106? decays collected by the BABAR detector near the?(4S),?(3S) and?(2S) resonances. The searches yield no evidence of signals and they set upper limits on the branching fractions of?(?{sup {+-}} → e{sup {+-}}?)

Search for Lepton Flavor Violation in Tau− to Ell− Ell Ell−
Search for Lepton Flavor Violation in Tau− to Ell− Ell Ell−

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Published: 2003

Total Pages: 7

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A search for the lepton-flavor-violating decay of the tau into three charged leptons has been performed using 91.5 fb−1 of data collected at an ee− center-of-mass energy of 10.58 GeV with the BABAR detector at the PEP-II storage ring. In all six decay modes considered, the numbers of events found in data are compatible with the background expectations. Upper limits on the branching fractions are set in the range (1-3) x 10−7 at 90% confidence level.