Universality and Lepton Flavor Violation in Upsilon Decays at CLEO

Details Universality and Lepton Flavor Violation in Upsilon Decays at CLEO Universality and Lepton Flavor Violation in Upsilon Decays at CLEO

2006-10-31

arxiv.org/abs/hep-ex/0610089v1

Nucl.Phys.Proc.Suppl.169:56-63,2007

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 5 figures, to appear in proceedings of The 9th International Workshop on Tau-Lepton Physics, Tau06

Scientific paper

10.1016/j.nuclphysbps.2007.02.11

I present two analyses done with the CLEOIII detector at CESR. The first is a search for the Lepton Flavor Violating decay Upsilon to mu tau, with preliminary results, and the second constrains Lepton Universality in Upsilon to tau tau relative to Upsilon to mu mu. This second analysis, whose results are final, has dramatically improved uncertainties relative to other such measurements, and is also the first observation of the decay Upsilon(3S) to tau tau. A limit is also set on the involvement of a CP odd Higgs in the decay of the Upsilon(1S) to tau pairs.

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