6533b7d7fe1ef96bd126908c
RESEARCH PRODUCT
Further Comments on a Vanishing Singlet Axial Vector Charge
T. P. ChengN. I. KochelevVicente Ventosubject
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)Pseudovectordescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-12-18 |