Study of tau lepton decays to three charged hadrons and one neutral pion
We report a study of ? lepton decays to three charged hadrons and a ? ^0 . We use (7.56 ± 0.15) fb -1 of data collected with the CLEO III detector at the ? (4S) resonance, which corresponds to a total of (6.90 ± 0.14) × 10 ^6 ?-pairs. Using both a Ring Imaging Cherenkov (RICH) detector and measurement of specific ionization energy loss ( dE/dx ) for particle identification, we report the first observation of the decay ? - ? K - ? ? ? . We report the first statistically significant measurements of the branching fractions for ? - ? K - ? ^+ ? - ? ^0 ? ? (excluding K ^0 ), ? - ? K - K ^+ ? - ? ^0 ? ? and the first published upper limit for ? - ? K - K ^+ K - ? ^0 ? ? . We also measure branching fractions for the decays, ? - ? h - ? ? ? , ? - ? ? - ? ? ? , ? - ? h - h ^+ h - ? ^0 ? ? , and ? - ? ? - ? ^+ ? - ? ^0 ? ? .
School:The Ohio State University
School Location:USA - Ohio
Source Type:Master's Thesis
Keywords:particle physics tau lepton omega meson high energy cleo
Date of Publication:01/01/2005