6533b7dbfe1ef96bd1270092
RESEARCH PRODUCT
Pinched weights and duality violation in QCD sum rules: A critical analysis
Antonio PichMartín González-alonsoJoaquim Pradessubject
Quantum chromodynamicsPhysicsNuclear and High Energy PhysicsParticle physicsQCD sum rulesDimension (graph theory)FísicaFOS: Physical sciencesDuality (optimization)Correlation function (quantum field theory)CombinatoricsHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics::ExperimentOperator product expansionQuantum field theorySeries expansiondescription
We analyze the so-called pinched weights, that are generally thought to reduce the violation of quarkhadron duality in finite-energy sum rules. After showing how this is not true in general, we explain how to address this question for the left-right correlator and any particular pinched weight, taking advantage of our previous work [1], where the possible high-energy behavior of the left-right spectral function was studied. In particular, we show that the use of pinched weights allows to determine with high accuracy the dimension six and eight contributions in the operator-product expansion, O-6 = (-4.3(-0.7)(+0.9)) x 10(-3) GeV6 and O-8 = (-7.2(-5.3)(+4.2)) x 10(-3) GeV8.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-07-28 | Physical Review D |