Possible duality violations in tau decay and their impact on the determination of alpha_s

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dc.creatorCata, Oscar
dc.creatorGolterman, Maarten
dc.creatorPeris, Santiago
dc.date2008-12-12
dc.date2008-12-19
dc.date.accessioned2026-07-07T13:11:10Z
dc.date.available2026-07-07T13:11:10Z
dc.descriptionWe discuss the issue of duality violations in hadronic tau decay. After introducing a physically motivated ansatz for duality violations, we estimate their possible size by fitting this ansatz to the tau experimental data provided by the ALEPH collaboration. Our conclusion is that these data do not exclude significant duality violations in tau decay. This may imply an additional systematic error in the value of alpha_s(m_tau), extracted from tau decay, as large as δalpha_s(m_tau) \sim 0.003-0.010 .
dc.description20 pages, 4 figures. Minor fixes in the Appendix
dc.identifierhttps://arxiv.org/abs/0812.2285
dc.identifierhttp://arxiv.org/abs/0812.2285
dc.identifierPhys.Rev.D79:053002,2009
dc.identifierdoi:10.1103/PhysRevD.79.053002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229204
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.subjectHigh Energy Physics - Lattice
dc.subjectNuclear Theory
dc.titlePossible duality violations in tau decay and their impact on the determination of alpha_s
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