6533b853fe1ef96bd12abf19

RESEARCH PRODUCT

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

Karl SchilcherHubert SpiesbergerA.a. Almasy

subject

PhysicsQuantum chromodynamicsNuclear and High Energy PhysicsParticle physicsAlephDimension (vector space)HadronHigh Energy Physics::ExperimentLinear combination

description

Abstract The high-precision data from hadronic τ 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.

yearjournalcountryeditionlanguage
2007-06-01Physics Letters B
https://doi.org/10.1016/j.physletb.2007.05.009