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

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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 10{sup 6} {Upsilon}(3S) decays recorded with the BABAR detector. We place upper limits on the branching fractions BF({Upsilon}(3S) {yields} e{sup {+-}}{tau}{sup {-+}}) < 5.0 x 10{sup -6} and BF({Upsilon}(3S) {yields} {mu}{sup {+-}}{tau}{sup {-+}}) < 4.1 x 10{sup -6} at 90% confidence level. These results are used to place lower limits on the mass scale of beyond-the-Standard Model ... continued below

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15 pages

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Aubert, B. December 11, 2008.

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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 10{sup 6} {Upsilon}(3S) decays recorded with the BABAR detector. We place upper limits on the branching fractions BF({Upsilon}(3S) {yields} e{sup {+-}}{tau}{sup {-+}}) < 5.0 x 10{sup -6} and BF({Upsilon}(3S) {yields} {mu}{sup {+-}}{tau}{sup {-+}}) < 4.1 x 10{sup -6} at 90% confidence level. These results are used to place lower limits on the mass scale of beyond-the-Standard Model physics contributing to lepton-flavor violating decays of the {Upsilon}(3S).

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15 pages

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  • Submitted to the 6th International Workshop on Heavy Quarkonia, 2-5 December 2008, Nara, Japan

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  • Report No.: SLAC-PUB-13480
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 944070
  • Archival Resource Key: ark:/67531/metadc901407

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  • December 11, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 1, 2016, 7:08 p.m.

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Aubert, B. Search For the Lepton-Flavor Violating Decays Y(3S)->e tau and Y(3S)->mu tau, article, December 11, 2008; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc901407/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.