Higher order polarizabilities of the proton
نویسنده
چکیده
Compton scattering results are used to probe proton structure via measurement of higher order polarizabilities. Values for αpE2, β p E2, α p Eν , β Eν determined via dispersion relations are compared to predictions based upon chiral symmetry and from the constituent quark model. Extensions to spin-polarizabilities are also discussed.
منابع مشابه
O ct 1 99 9 Higher Order Polarizabilities of the Proton Barry R . Holstein Institut für Kernphysik Forschungszentrum Jülich D - 52425
Compton scattering results are used to probe proton structure via measurement of higher order polarizabilities. Values for αpE2, β p E2, α p Eν , β p Eν determined via dispersion relations are compared to predictions based upon chiral symmetry and from the constituent quark model. Extensions to spin-polarizabilities are also discussed.
متن کاملv 2 2 6 O ct 1 99 9 Higher Order Polarizabilities of the Proton B . R . Holstein Institut für Kernphysik Forschungszentrum Jülich D - 52425 Jülich , Germany
Compton scattering results are used to probe proton structure via measurement of higher order polarizabilities. Values for α p E2 , β p E2 , α p Eν , β p Eν determined via dispersion relations are compared to predictions based upon chiral symmetry and from the constituent quark model. Extensions to spin-polarizabilities are also discussed.
متن کاملVirtual Compton Scattering and generalized polarizabilities of the proton
Threshold photon electroproduction off the proton allows one to measure new electromagnetic observables which generalize the usual polarizabilities. There are – a priori – ten “generalized polarizabilities”, functions of the virtual photon mass. The purpose of this paper is to lay down the appropriate formalism to extract these quantities from the photon electroproduction cross sections. We als...
متن کاملDeuteron Compton Scattering and Electromagnetic Polarizabilities of the Nucleon *
Differential cross section of deuteron Compton scattering has been calculated using the Bonn NN-potential, a consistent set of meson-exchange currents and seagulls, and lowest-and higher-order electromagnetic polarizabilities of the nucleon. Estimates of the polarizabilities of the neutron are obtained from recent experimental data. Photon scattering is a powerful tool for probing the structure...
متن کاملResponse of nucleons to external probes in hedgehog models. I. Electromagnetic polarizabilities.
Electromagnetic polarizabilities of the nucleon are analyzed in a hedgehog model with quark and meson degrees of freedom. Semiclassical methods are used (linear response theory, quantization via cranking). It is found that in hedgehog models (Skyrmion, chiral quark models, Nambu–Jona-Lasinio model), the average electric polarizability of the nucleon, αN , is of the order Nc, and the splitting o...
متن کامل