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Extraction of the Strong Coupling Constant and Strange Quark Mass from Semileptonic τ Decays

  • Part II Modelling QCD
  • Chapter
  • First Online:
Heavy Quark Physics

Part of the book series: Lecture Notes in Physics ((LNP,volume 647))

Abstract

In this lecture I present a pedagogical introduction to the low-energy phenomenology of light flavors. The renormalization scheme freedom in defining QCD parameters is discussed. I show in some details how one can extract an accurate numerical value for the strong coupling constant from the τ-lepton decay rate into hadrons. As a related topic I discuss some peculiarities of the precise definition of the quark mass in theories with confinement and describe the strange quark mass determination from data on τ-lepton decays employing contour resummation which is a modern technique of the precision analysis in perturbative QCD.

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Authors and Affiliations

  1. Institute for Nuclear Research of the Russian Academy of Science, 117312 Moscow, Russia

    Alexei A. Pivovarov

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  1. Alexei A. Pivovarov
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David Blaschke Mikhal A. Ivanov Thomas Mannel

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Pivovarov, A.A. Extraction of the Strong Coupling Constant and Strange Quark Mass from Semileptonic τ Decays. In: Blaschke, D., Ivanov, M.A., Mannel, T. (eds) Heavy Quark Physics. Lecture Notes in Physics, vol 647. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-40975-5_11

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  • DOI: https://doi.org/10.1007/978-3-540-40975-5_11

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