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

K. M. Ecklund, W. Love, V. Savinov, A. Lopez, H. Mendez, J. Ramirez, J. Y. Ge, D. H. Miller, I. P.J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, D. Hu, B. Moziak, J. Napolitano, Q. He, J. Insler, H. MuramatsuC. S. Park, E. H. Thorndike, F. Yang, M. Artuso, S. Blusk, S. Khalil, J. Li, R. Mountain, S. Nisar, K. Randrianarivony, N. Sultana, T. Skwarnicki, S. Stone, J. C. Wang, L. M. Zhang, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, J. Rademacker, D. M. Asner, K. W. Edwards, P. Naik, J. Reed, R. A. Briere, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, J. P. Alexander, D. G. Cassel, J. E. Duboscq, R. Ehrlich, L. Fields, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Krüger, D. Mohapatra, P. U.E. Onyisi, J. R. Patterson, D. Peterson, D. Riley, A. Ryd, A. J. Sadoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, S. B. Athar, R. Patel, J. Yelton, P. Rubin, B. I. Eisenstein, I. Karliner, S. Mehrabyan, N. Lowrey, M. Selen, E. J. White, J. Wiss, R. E. Mitchell, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, P. Zweber, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, J. Libby, A. Powell, G. Wilkinson

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Abstract

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.

Original languageEnglish (US)
Article number161801
JournalPhysical Review Letters
Volume100
Issue number16
DOIs
StatePublished - Apr 21 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Ecklund, K. M., Love, W., Savinov, V., Lopez, A., Mendez, H., Ramirez, J., Ge, J. Y., Miller, D. H., Shipsey, I. P. J., Xin, B., Adams, G. S., Anderson, M., Cummings, J. P., Danko, I., Hu, D., Moziak, B., Napolitano, J., He, Q., Insler, J., ... Wilkinson, G. (2008). Measurement of the absolute branching fraction of Ds+→τ+ντ decay. Physical Review Letters, 100(16), [161801]. https://doi.org/10.1103/PhysRevLett.100.161801