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

Abstract

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.

arXiv comment11 pages

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Cited by in corpus (10)

• A Rational Approach to Resonance Saturation in large-Nc QCD
• Pinched weights and Duality Violation in QCD Sum Rules: a critical analysis
• Tests of non-standard electroweak couplings of right-handed quarks
• Violation of Quark-Hadron Duality and Spectral Chiral Moments in QCD
• Updated determination of chiral couplings and vacuum condensates from hadronic tau decay data
• Quark deconfinement and gluon condensate in a weak magnetic field
• Determination of QCD condensates from tau-decay data
• Chiral sum rules and vacuum condensates from tau-lepton decay data
• QCD Description of Hadronic Tau Decays
• Duality violation in QCD Sum Rules with the LR correlator