0000000000025356

AUTHOR

N. I. Kochelev

showing 2 related works from this author

Further Comments on a Vanishing Singlet Axial Vector Charge

1998

The recent suggestion of a vanishing flavor-singlet axial charge of nucleon due to a nontrivial vacuum structure is further amplified. A perturbative QCD discussion, applicable for the heavy quark contributions, relates it to the physics of the decoupling theorem. It is also shown that $g_{A}^{0}\simeq 0$ leads to a negative $\eta'$-meson-quark coupling, which has been found to be compatible with the chiral quark model phenomenology.

PhysicsQuarkNuclear and High Energy PhysicsParticle physicsHigh Energy Physics::LatticeQuark modelNuclear TheoryHigh Energy Physics::PhenomenologyFOS: Physical sciencesGeneral Physics and AstronomyPerturbative QCDFísicaAstronomy and AstrophysicsDecoupling (cosmology)High Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics::ExperimentSinglet stateNucleonNuclear ExperimentPhenomenology (particle physics)Pseudovector
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Instantons and theΔI=1/2Rule

2001

The instanton-induced interaction leads to a significant enhancement of the Ao weak amplitude determining the DeltaI = 1/2 rule, through the contribution of operators with dimension d = 9, as we show in the weak K--> pi(pi) decay.

PhysicsInstantonAmplitudeDimension (vector space)General Physics and AstronomyMathematical physicsPhysical Review Letters
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