Issues in determining alpha_s from hadronic tau decay and electroproduction data

Details Issues in determining alpha_s from hadronic tau decay and electroproduction data Issues in determining alpha_s from hadronic tau decay and electroproduction data

2011-12-18

arxiv.org/abs/1112.4202v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 4 figures. Prepared for the Proceedings of the International Workshop on e+e- collisions from Phi to Psi (PHIPSI11),

Scientific paper

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 alpha_s from hadronic tau 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.

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