Resumo

ERLER, J.. Electroweak radiative corrections to semileptonic τ decays. Rev. mex. fis. [online]. 2004, vol.50, n.2, pp.200-202. ISSN 0035-001X.

I present an update on the electroweak radiative correction factor to semileptonic τ decays, including a next-to-leading order resummation of large logarithms. My result differs both qualitatively and quantitatively from the one recently obtained by Davier et al.. As two consequences, (i) the discrepancy between the predictions for the muon g - 2 based on τ decay data and e⁺e^- annihilation data increases, and (ii) the g - 2 prediction based on τ decay data appears to be consistent (within about one standard deviation) with the experimental result from BNL.

Palavras-chave : Electroweak radiative corrections; tau decay; perturbative QCD.

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