0000000000117268

AUTHOR

B.-y. Park

showing 2 related works from this author

Proton spin and the cheshire cat principle

1991

Abstract We discuss the proton matrix element of the flavor-singlet axial current (FSAC), often referred to as proton spin, in terms of the chiral bag model with due account of the axial anomaly and quantum number fractionation. We conclude that the contribution due to gluons is significant for large bag radii and that it is crucial in order to establish the Cheshire cat principle.

PhysicsNuclear and High Energy PhysicsProtonHigh Energy Physics::LatticeHigh Energy Physics::PhenomenologyNuclear TheoryQuantum numberAtomic and Molecular Physics and OpticsGluonQuantum electrodynamicsProton spin crisisAxial currentMatrix elementAnomaly (physics)Nuclear Physics B - Proceedings Supplements
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Gluonic contributions in the chiral hyperbag

1990

Abstract We incorporate into a non-perturbative chiral bag model scheme the gluons and the η' in a perturbative fashion. We analyze in this context the proton matrix element for the flavor singlet axial current, where due account is taken of the anomaly, and the delta-nucleon mass difference. Our results show that the contribution due to the gluons is significant for large bag radii and that they are crucial in order to establish the Cheshire cat principle.

PhysicsNuclear and High Energy PhysicsParticle physicsQuantization (physics)High Energy Physics::LatticeHigh Energy Physics::PhenomenologyNuclear TheoryAxial currentMatrix elementSinglet stateNuclear ExperimentGluonNuclear Physics A
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