Updated determination of α<inf>s</inf> from hadronic τ decays

Diogo Boito, Maarten Golterman, Matthias Jamin, Andisheh Mahdavi, Kim Maltman, James Osborne, Santiago Peris

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1 Citation (Scopus)

Abstract

Recently we introduced a new framework to extract αs from the non-strange hadronic τ-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 αsFO(mτ2)=0.325±0.018 and αsCl(mτ2)=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. © 2013 Elsevier B.V.
Original languageEnglish
Pages (from-to)203-206
JournalNuclear Physics B - Proceedings Supplements
Volume234
DOIs
Publication statusPublished - 1 Jan 2013

Keywords

  • α s
  • Duality violations
  • Tau decay

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