Search for the Lepton Flavour Violating Decay Tau-]e Gamma
Search for the Lepton Flavour Violating Decay Tau-]e Gamma

Author: Clayton Daniel Lindsay

Publisher:

Published: 2009

Total Pages:

ISBN-13:

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A search is done on the entire BaBar data set for the neutrino-less tau decay tau->e gamma. No evidence for the decay is found and a 90% confidence level upper limit is determined to be 3.3 * 10^( -8) including systematic uncertainty. This measurement is a factor of three improvement from the previous best result from BaBar.

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

Author:

Publisher:

Published: 2008

Total Pages: 15

ISBN-13:

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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 the Lepton Flavour Violating Decay Tau-]e Gamma
Search for the Lepton Flavour Violating Decay Tau-]e Gamma

Author:

Publisher:

Published: 2008

Total Pages:

ISBN-13:

DOWNLOAD EBOOK

A search is done on the entire BaBar data set for the neutrino-less tau decay tau->e gamma. No evidence for the decay is found and a 90% confidence level upper limit is determined to be 3.3 * 10^( -8) including systematic uncertainty. This measurement is a factor of three improvement from the previous best result from BaBar.