6533b858fe1ef96bd12b6c75
RESEARCH PRODUCT
The Drell-Hearn-Gerasimov sum rule and the constituent quark model
M. M. GianniniD. Drechselsubject
PhysicsParticle physicsNuclear TheoryQuark modelConstituent quarkHelicityAtomic and Molecular Physics and OpticsQuantum electrodynamicsHigh Energy Physics::ExperimentSum rule in quantum mechanicsNuclear ExperimentNucleonMultipole expansionWave functionExcitationdescription
The helicity structure function of the nucleon has been calculated for the constituent quark model and compared to the prediction of the Drell-Hearn-Gerasimov sum rule. The multipole decomposition of the sum rule shows large cancellations between different resonances. The small isoscalar-isovector contribution is related to the admixture of aD-state (“bag deformation”) in the nucleon's wave function. The calculations indicate a relatively slow saturation of this part of the sum rule with excitation energy.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-01-01 | Few-Body Systems |