Search for Lepton Flavor Violation in the Decays Tau-]e Gamma and Tau-]mu Gamma PDF Download
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![Search for Lepton Flavor Violation in the Decays Tau-]e Gamma and Tau-]mu Gamma PDF](https://books.google.com/books/content/images/frontcover/_jKcnQAACAAJ?fife=w150-h200)
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Languages : en
Pages : 7
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Book Description
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 Violation in the Decays Tau-]e Gamma and Tau-]mu Gamma PDF](https://books.google.com/books/content/images/frontcover/_jKcnQAACAAJ?fife=w80-h100)
Author:
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Category :
Languages : en
Pages : 7
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Book Description
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])
![Searches for Lepton Flavor Violation in the Decays Tau+- ---] E+- Gamma and Tau+- ---] Mu+- Gamma PDF](https://books.google.com/books/content/images/frontcover/ZRQCwgEACAAJ?fife=w80-h100)
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Languages : en
Pages : 7
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Book Description
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 {+-}}?)
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Languages : en
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Author: O. Igonkina
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Languages : en
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The authors present a recent BABAR search for lepton flavor violation in tau decays. The search for {tau} {yields} {ell}{ell}{ell} ({ell} = e, {mu}) decays is based on a data sample of 91.6 fb{sup -1}. No signal is found in any of six channels and 90% CL upper limits are set in the range of (1-3) x 10{sup -7}. The search for {tau} {yields} {mu}{gamma} decay is done with a 63 fb{sup -1} data sample. The number of observed events is consistent with expected background level and a preliminary upper limit is set at 2 x 10{sup -6} at 90% CL.
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Languages : en
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Author: M. Roney
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Languages : en
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A search for the lepton flavour violating decay {tau}{sup {+-}} {yields} {mu}{sup {+-}}{gamma} has been performed using 221.4 fb{sup -1} of data collected at an e{sup +}e{sup -} centre-of-mass energy of 10.58 GeV with the BABAR detector at the PEP-II storage ring. The search has an efficiency of 7.45 {+-} 0.65% for an expected background level of 6.2 {+-} 0.5 events. In the final sample 4 candidate events are selected. As there is no evidence for a signal in this data, for this preliminary result we set an upper limit of {Beta}({tau}{sup {+-}} {yields} {mu}{sup {+-}}{gamma})
Author: Swagato Banerjee
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Languages : en
Pages : 5
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Searches for lepton flavor violating tau {yields} l gamma, tau {yields} lhh decays at the BABAR experiment are presented. Upper limits on the branching ratios are obtained at the level of O(10{sup -7}) at 90% confidence level.
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Languages : en
Pages : 11
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A search for the lepton family number violating decays [tau] 2!e[gamma] and [tau] 2![mu][gamma] has been performed using CLEO-II data. No evidence of a signal has been found and the corresponding upper limits are B([tau] 2!e[gamma])
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Languages : en
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![Search For the Lepton-Flavor Violating Decays Y(3S)-]e Tau and Y(3S)-]mu Tau PDF](https://books.google.com/books/content/images/frontcover/-mOkAQAACAAJ?fife=w80-h100)
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Languages : en
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 {-+}})
