Abstract
We discuss some key issues associated with duality-violating and non-perturbative OPE contributions to the theoretical representations of light quark current-current two-point functions and relevant to precision determinations of α s from hadronic τ decay and electroproduction cross-section data. We demonstrate that analyses with an explicit representation of duality-violating effects are required to bring theoretical errors in such extractions under control, motivating the accompanying paper in these proceedings, which presents the results of such an analysis. © 2012 Elsevier B.V.
Original language | English |
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Pages (from-to) | 153-156 |
Journal | Nuclear Physics B - Proceedings Supplements |
Volume | 225-227 |
DOIs | |
Publication status | Published - 1 Apr 2012 |
Keywords
- α s
- τ decay
- Duality violation