6533b82cfe1ef96bd129008b
RESEARCH PRODUCT
Generalized polarizabilities of the proton in a constituent quark model revisited
Dieter DrechselStefan SchererB. Pasquinisubject
PhysicsNuclear and High Energy PhysicsNuclear TheoryProtonStructure (category theory)Compton scatteringConstituent quarkFOS: Physical sciencesResidualNuclear Theory (nucl-th)High Energy Physics - PhenomenologyTheoretical physicsHigh Energy Physics - Phenomenology (hep-ph)Quantum electrodynamicsBibliographyTensorGauge theorydescription
We study low-energy virtual Compton scattering off the proton within the framework of a nonrelativistic constituent quark model. The Compton tensor is divided into two separately gauge-invariant contributions. The first consists of the groundstate propagation in the direct and crossed channels together with an appropriately chosen term to satisfy gauge invariance. The residual part contains the relevant structure information characterized by the so-called generalized polarizabilities. We discuss two different schemes to obtain the generalized polarizabilities from the residual term. Explicit predictions for the generalized polarizabilities are presented for the Isgur-Karl model. Our results are compared with previous predictions in that model as well as other approaches.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-01-19 |