QCD condensates of dimension D=6 and D=8 from hadronic tau-decays

Details QCD condensates of dimension D=6 and D=8 from hadronic tau-decays QCD condensates of dimension D=6 and D=8 from hadronic tau-decays

2006-12-22

arxiv.org/abs/hep-ph/0612304v1

Phys.Lett.B650:179-184,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages

Scientific paper

10.1016/j.physletb.2007.05.009

The high-precision data from hadronic tau decays allows one to extract information on QCD condensates. Using the finalized ALEPH data, we obtain a more rigorous determination of the dimension 6 and 8 condensates for the V-A correlator. In particular, we find that the recent data fix a certain linear combination of these QCD condensates to a precision at the level of O(2%). Our approach relies on more general assumptions than alternative approaches based on finite energy sum rules.

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