6533b852fe1ef96bd12ab7d4
RESEARCH PRODUCT
Generalized Polarizabilities and the Chiral Structure of the Nucleon
Thomas R. HemmertStefan SchererBarry R. HolsteinG. Knöchleinsubject
Nuclear and High Energy PhysicsChiral perturbation theoryNuclear TheoryAstrophysics::High Energy Astrophysical PhenomenaNuclear TheoryStructure (category theory)General Physics and AstronomyFOS: Physical sciences01 natural sciencesNuclear Theory (nucl-th)High Energy Physics - Phenomenology (hep-ph)PolarizabilityQuantum mechanics0103 physical sciencesPerturbation theoryNuclear Experiment010306 general physicsPhysicsChiral symmetry010308 nuclear & particles physicsComputer Science::Information RetrievalHigh Energy Physics::PhenomenologyCompton scatteringHigh Energy Physics - PhenomenologyNucleonElectron scatteringdescription
We are studying the electron scattering process e p to e' p' gamma in order to obtain information on the genuine virtual Compton scattering (VCS) process gamma^* N to gamma N. In addition to the two kinematical variables of real Compton scattering, e.g. the scattering angle theta and the energy omega' of the outgoing photon, the invariant amplitude for VCS depends on a third kinematical variable, which we choose as the absolute value of the three-momentum transfer to the nucleon. The structure-dependent coefficients in the VCS amplitude therefore acquire a momentum dependence and are termed ``generalized polarizabilities'' of the nucleon in analogy to real Compton scattering. Utilizing the heavy baryon formalism of chiral perturbation theory we present predictions for the momentum dependence of the ``generalized polarizabilities'' and discuss the VCS response functions to be measured in the scheduled electron scattering experiments.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-09-25 |