6533b7d1fe1ef96bd125d868
RESEARCH PRODUCT
QCD Condensates for the Light Quark V-A Correlator
Eugene GolowichVincenzo CiriglianoKim MaltmanKim Maltmansubject
PhysicsQuantum chromodynamicsQuarkNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsOperator (physics)Electroweak interactionHadronHigh Energy Physics::PhenomenologyFOS: Physical sciences01 natural sciences3. Good healthMatrix (mathematics)High Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesOperator product expansion010306 general physicsEnergy (signal processing)description
We use the procedure of pinched-weight Finite Energy Sum Rules (pFESR) to determine the OPE coefficients a_6, ...,a_16 of the flavor ud V-A correlator in terms of existing hadronic tau decay data. We show by appropriate weight choices that the error on the dominant d=6 contribution, which is known to be related to the K -> Pi Pi matrix elements of the electroweak penguin operator in the chiral limit, may be reduced to below the ~15% level. The values we obtain for the OPE coefficients with d>8 are shown to naturally account for the discrepancies between our results for the d=6 and d=8 terms and those of previous analyses, which were obtained neglecting d>8 contributions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-05-12 |