6533b82ffe1ef96bd1295aec
RESEARCH PRODUCT
Higher order forward spin polarizability
P. PedroniDieter DrechselBarbara PasquiniBarbara Pasquinisubject
Nuclear and High Energy PhysicsChiral perturbation theoryNuclear Theorynucl-thNuclear TheoryFOS: Physical sciencesNucleon spin structurenucl-ex01 natural sciencesHigh Energy Physics - ExperimentNuclear physicsNuclear Theory (nucl-th)High Energy Physics - Experiment (hep-ex)PionHigh Energy Physics - Phenomenology (hep-ph)PolarizabilityDispersion relation0103 physical sciencesNuclear Experiment (nucl-ex)010306 general physicsNuclear ExperimentNuclear ExperimentSpin-½Physics010308 nuclear & particles physicshep-exCompton scatteringhep-phHigh Energy Physics - PhenomenologyQuantum electrodynamicsNucleondescription
As a guideline for future experiments to extract the four (leading) spin polarizabilities of the nucleon, we have constructed the forward amplitude for polarized Compton scattering by dispersion integrals. These integrals have been saturated by recently measured helicity-dependent photoabsorption cross sections as well as predictions for pion photoproduction multipoles from several phenomenological descriptions and chiral perturbation theory. The comparison of these results corroborates the strategy to extract the spin polarizabilities by fitting them to polarized Compton data and fixing all higher order spin effects by dispersion relations based on pion photoproduction multipoles.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-01-24 |