Tau lepton distributions in semileptonic B decays Original Research Article

Analytic formulae are given for order αs perturbative QCD corrections to the double differential distribution of the τ lepton energy and the invariant mass of the τ+antineutrino system in semileptonic decays of the bottom quark. The corresponding distribution for B meson decays are obtained by combining these results and the non-perturbative QCD corrections calculated by Falk et al. The moments of the energy distribution of the τ lepton are calculated.