Updated determination of αs from hadronic τ decays

Recently we introduced a new framework to extract alpha(s) from the non-strange hadronic tau-decay spectral functions taking into account duality violations and treating nonperturbative effects self-consistently. Using an updated version of the OPAL 1998 data, we obtain alpha(FO)(s)(m(tau)(2)) = 0.325 +/- 0.018 and alpha(CI)(s)(m(tau)(2)) = 0.347 +/- 0.025 in fixed-order and contour-improved perturbation theory, respectively. The results from our multi-parameter nonlinear fits were corroborated by a Markov-Chain Monte Carlo investigation of the posterior probability distributions of the model parameters.