Update analysis of : Theory and Experiment

2009

Within the resonance chiral theory (RχT), we have studied the process of a tau lepton decaying into a vector resonance plus a pseudo-Goldstone meson and a tau neutrino. Two kinds of processes are discussed: (a) τ − → ( ρ 0 π − , ω π − , ϕ π − , K ∗ 0 K − ) ν τ , belonging to Δ S = 0 processes and (b) Δ S = 1 processes, such as τ − → ( ρ 0 K − , ω K − , ϕ K − , K ¯ ∗ 0 π − ) ν τ . To fit the τ − → ω π − ν τ spectral function and the decay distribution of τ − → ω K − ν τ to get unknown resonance couplings, we then make a prediction for branching ratios of all channels.