We measure the T lepton lifetime with τ+τ- pairs in which one or both of the τ's decays to three charged particles. The data were collected with the CLEO II detector operating at the electron-positron collider CESR at energies on and near the Y (4S). We use displacements of the three-track vertices to determine the τ lifetime. The result is ττ = 289.0 ± 2.8 ± 4.0 fs.
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - 14 Nov 1996|