Search For the Lepton-Flavor Violating Decays Y(3S)->e tau and Y(3S)->mu tau
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).
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 944070
- Report Number(s):
- SLAC-PUB-13480; arXiv:0812.1021; TRN: US0900508
- Resource Relation:
- Conference: Submitted to the 6th International Workshop on Heavy Quarkonia, 2-5 December 2008, Nara, Japan
- Country of Publication:
- United States
- Language:
- English
Similar Records
Search for Charged Lepton Violation in Narrow Upsilon Decays
Search for Charged Lepton Flavor Violation in Narrow {Upsilon} Decays