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 language | English (US) |
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Article number | 181802 |
Pages (from-to) | 181802/1-181802/5 |
Journal | Physical review letters |
Volume | 90 |
Issue number | 18 |
State | Published - May 9 2003 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy