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Generalized Polarizabilities and Electroexcitation of the Nucleon
BibTeX
@MISC{Krein_generalizedpolarizabilities,
author = {Drechsel Krein and D. Drechsel and G. Krein and S. S. Kamalov and B. Pasquini and L. Tiator},
title = {Generalized Polarizabilities and Electroexcitation of the Nucleon},
year = {}
}
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Abstract
Generalized nucleon polarizabilities for virtual photons can be defined in terms of electroproduction cross sections as function of the 4-momentum transfer Q 2 . In particular, the sum of the generalized electric and magnetic polarizabilities \Sigma = ff + fi and the spin polarizability fl can be expressed by virtual photon absorption cross sections integrated over the excitation energy. These quantities have been calculated within the framework of the recently developed unitary isobar model for pion photo- and electroproduction on the proton, which describes the available experimental data up to an excitation energy of about 1 GeV. Our results have been compared to the predictions of chiral perturbation theory. PACS NUMBERS: 13.60.Fz,11.55.Fv,14.20.Dh,13.60.Le,13.88.+e KEYWORDS: Inelastic electron scattering, electroexcitation, virtual Compton scattering, nucleon polarizabilities, spin content of the nucleon Permanent Address: Laboratory of Theoretical Physics, JINR Dubna, Head Po...
Keyphrases
excitation energy nucleon polarizabilities theoretical physic unitary isobar model magnetic polarizabilities inelastic electron scattering chiral perturbation theory sigma ff fi pac number available experimental data electroproduction cross section spin polarizability fl 4-momentum transfer spin content pion photo virtual photon virtual compton scattering head po jinr dubna virtual photon absorption cross section nucleon permanent address
