Branching fractions of τ Leptons to three charged Hadrons

R. A. Briere, G. P. Chen, T. Ferguson, G. Tatishvili, H. Vogel, N. E. Adam, J. P. Alexander, K. Berkelman, V. Boisvert, D. G. Cassel, P. S. Drell, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, R. S. Galik, L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. HeltsleyL. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, A. Magerkurth, H. Mahlke-Krüger, T. O. Mever, N. B. Mistry, J. R. Patterson, D. Peterson, J. Pivarski, S. J. Richichi, D. Riley, A. J. Sadoff, H. Schwarthoff, M. R. Shepherd, J. G. Thayer, D. Urner, T. Wilksen, A. Warburton, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, V. Potlia, H. Stoeck, J. Yelton, K. Benslama, Yuichi Kubota, G. D. Gollin, I. Karliner, N. Lowrey, C. Plager, C. Sedlack, M. Selen, J. J. Thaler, J. Williams, K. W. Edwards, D. Besson, X. Zhao, S. Anderson, V. V. Frolov, D. T. Gong, S. Z. Li, R. Poling, A. Smith, C. J. Stepaniak, J. Urheim, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, S. Ahmed, M. S. Alam, J. Ernst, L. Jian, M. Saleem, F. Wappler, K. Arms, E. Eckhart, K. K. Gan, C. Gwon, K. Honscheid, D. Hufnagel, H. Kagan, R. Kass, T. K. Pedlar, E. Von Toerne, M. M. Zoeller, H. Severini, P. Skubic, S. A. Dytman, J. A. Mueller, S. Nam, V. Savinov, J. W. Hinson, J. Lee

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Abstract

An overview is given of the improved measurements of branching fractions for τ- → π-π+π-vτ, K-π+π-vτ decays, and an improved upper limit for the phase space suppressed and Cabibbo-suppressed decay τ- → K-K+K-vτ. The decay mode τ- → K-π+π-vτ has a significant contribution to the overall strange spectral function which can provide a direct determination of the strange quark mass and, potentially, precision extraction of the Cabibbo-Kobayashi-Maskawa element Vus. The decay τ- → K-K+π-vτ can proceed via both the vector and axial-vector currents.

Original languageEnglish (US)
Article number181802
Pages (from-to)181802/1-181802/5
JournalPhysical review letters
Volume90
Issue number18
StatePublished - May 9 2003

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