dorsal/arxiv
View SchemaNucleon generalized polarizabilities within a relativistic Constituent Quark Model
| Authors | B. Pasquini, G. Salme` |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9802079 |
| URL | https://arxiv.org/abs/nucl-th/9802079 |
| DOI | 10.1103/PhysRevC.57.2589 |
| Journal | Phys.Rev. C57 (1998) 2589-2596 |
Abstract
Nucleon generalized polarizabilities are investigated within a relativistic framework, defining such quantities through a Lorentz covariant multipole expansion of the amplitude for virtual Compton scattering. The key physical ingredients in the calculation of the nucleon polarizabilities are the Lorentz invariant reduced matrix elements of the electromagnetic transition current, which can be evaluated from off-energy-shell helicity amplitudes. The evolution of the proton paramagnetic polarizability, $\beta_{para}(q)$, as a function of the virtual-photon three-momentum transfer $ q,$ is explicitly evaluated within a relativistic constituent quark model by adopting transition form factors obtained in the light-front formalism. The discussion is focussed on the role played by the effects due to the relativistic approach and to the transition form factors, derived within different models.
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"abstract": "Nucleon generalized polarizabilities are investigated within a relativistic\nframework, defining such quantities through a Lorentz covariant multipole\nexpansion of the amplitude for virtual Compton scattering. The key physical\ningredients in the calculation of the nucleon polarizabilities are the Lorentz\ninvariant reduced matrix elements of the electromagnetic transition current,\nwhich can be evaluated from off-energy-shell helicity amplitudes. The evolution\nof the proton paramagnetic polarizability, $\\beta_{para}(q)$, as a function of\nthe virtual-photon three-momentum transfer $ q,$ is explicitly evaluated within\na relativistic constituent quark model by adopting transition form factors\nobtained in the light-front formalism. The discussion is focussed on the role\nplayed by the effects due to the relativistic approach and to the transition\nform factors, derived within different models.",
"arxiv_id": "nucl-th/9802079",
"authors": [
"B. Pasquini",
"G. Salme`"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevC.57.2589",
"journal_ref": "Phys.Rev. C57 (1998) 2589-2596",
"title": "Nucleon generalized polarizabilities within a relativistic Constituent Quark Model",
"url": "https://arxiv.org/abs/nucl-th/9802079"
},
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