Abstract
The present thesis describes the electromagnetic excitation of baryonic resonances up to 2 GeV in the constituent quark model. A given baryon spectrum is tested in exclusive two-particle reactions and cross sections as well as polarization observables are calculated. For this a formalism for the calculation of general polarization observables in exclusive two-particle reaction is presented and applied to the photoproduction of pseudoscalar mesons and the Compton scattering. Resonant and non-resonant contributions to the scattering amplitude are derived in the framework of a Feshbach projection formalism and by this calculated consistently with the baryon spectrum. For photoinduced reactions a multipole analysis is performed and characteristic angular distributions of the cross section and simple polarization observables are studied. The photon-baryon vertex function is derived from the simple photon-quark vertex and decomposed in transverse and longitudinal quark momenta. The magnetic quark moment is modified by addition of vector-dominance contributions, and the spin-orbit correction terms are calculated. The results for two differnt baryon spectra are shown and discussed. (HSI).
Citation Formats
Brink, W ten.
Electromagnetic excitation of baryonic resonances up to 2 GeV in the constituent quark model; Elektromagnetische Anregung baryonischer Resonanzen bis 2 GeV im Constituent Quark Modell.
Germany: N. p.,
1990.
Web.
Brink, W ten.
Electromagnetic excitation of baryonic resonances up to 2 GeV in the constituent quark model; Elektromagnetische Anregung baryonischer Resonanzen bis 2 GeV im Constituent Quark Modell.
Germany.
Brink, W ten.
1990.
"Electromagnetic excitation of baryonic resonances up to 2 GeV in the constituent quark model; Elektromagnetische Anregung baryonischer Resonanzen bis 2 GeV im Constituent Quark Modell."
Germany.
@misc{etde_10114345,
title = {Electromagnetic excitation of baryonic resonances up to 2 GeV in the constituent quark model; Elektromagnetische Anregung baryonischer Resonanzen bis 2 GeV im Constituent Quark Modell}
author = {Brink, W ten}
abstractNote = {The present thesis describes the electromagnetic excitation of baryonic resonances up to 2 GeV in the constituent quark model. A given baryon spectrum is tested in exclusive two-particle reactions and cross sections as well as polarization observables are calculated. For this a formalism for the calculation of general polarization observables in exclusive two-particle reaction is presented and applied to the photoproduction of pseudoscalar mesons and the Compton scattering. Resonant and non-resonant contributions to the scattering amplitude are derived in the framework of a Feshbach projection formalism and by this calculated consistently with the baryon spectrum. For photoinduced reactions a multipole analysis is performed and characteristic angular distributions of the cross section and simple polarization observables are studied. The photon-baryon vertex function is derived from the simple photon-quark vertex and decomposed in transverse and longitudinal quark momenta. The magnetic quark moment is modified by addition of vector-dominance contributions, and the spin-orbit correction terms are calculated. The results for two differnt baryon spectra are shown and discussed. (HSI).}
place = {Germany}
year = {1990}
month = {Dec}
}
title = {Electromagnetic excitation of baryonic resonances up to 2 GeV in the constituent quark model; Elektromagnetische Anregung baryonischer Resonanzen bis 2 GeV im Constituent Quark Modell}
author = {Brink, W ten}
abstractNote = {The present thesis describes the electromagnetic excitation of baryonic resonances up to 2 GeV in the constituent quark model. A given baryon spectrum is tested in exclusive two-particle reactions and cross sections as well as polarization observables are calculated. For this a formalism for the calculation of general polarization observables in exclusive two-particle reaction is presented and applied to the photoproduction of pseudoscalar mesons and the Compton scattering. Resonant and non-resonant contributions to the scattering amplitude are derived in the framework of a Feshbach projection formalism and by this calculated consistently with the baryon spectrum. For photoinduced reactions a multipole analysis is performed and characteristic angular distributions of the cross section and simple polarization observables are studied. The photon-baryon vertex function is derived from the simple photon-quark vertex and decomposed in transverse and longitudinal quark momenta. The magnetic quark moment is modified by addition of vector-dominance contributions, and the spin-orbit correction terms are calculated. The results for two differnt baryon spectra are shown and discussed. (HSI).}
place = {Germany}
year = {1990}
month = {Dec}
}