Measurement of the absolute branching fraction of Ds+→τ+ντ decay

Measurement of the absolute branching fraction of Ds+→τ+ντ decay

Using a sample of tagged Ds+ decays collected near the Ds*±Ds peak production energy in e+e- collisions with the CLEO-c detector, we study the leptonic decay Ds+→τ+ντ via the decay channel τ+→e+νeν̄τ. We measure B(Ds+→τ+ντ)=(6. 17±0.71±0.34)%, where the first error is statistical and the second syst...

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Bibliographic Details
Main Authors: Ecklund, K, Love, W, Savinov, V, Lopez, A, Mendez, H, Ramirez, J, Ge, J, Miller, D, Shipsey, I, Xin, B, Adams, G, Anderson, M, Cummings, J, Danko, I, Hu, D, Moziak, B, Napolitano, J, He, Q, Insler, J, Muramatsu, H, Park, C, Thorndike, E, Yang, F, Artuso, M, Blusk, S
Format: Journal article
Language:English
Published: 2008
Description
Summary:Using a sample of tagged Ds+ decays collected near the Ds*±Ds peak production energy in e+e- collisions with the CLEO-c detector, we study the leptonic decay Ds+→τ+ντ via the decay channel τ+→e+νeν̄τ. We measure B(Ds+→τ+ντ)=(6. 17±0.71±0.34)%, where the first error is statistical and the second systematic. Combining this result with our measurements of Ds+→μ+νμ and Ds+→τ+ντ (via τ+→π+ν ̄τ), we determine fDs=(274±10±5)MeV. © 2008 The American Physical Society.

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