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Chapter and Conference Paper
Helicity amplitudes of nonstrange baryons in the third and fourth resonance region
Baryon resonances with masses around 1600 MeV and higher come into play already at threshold in meson photo- and electroproduction reactions from the proton such as p(γ (*), ππ)N, p(γ ...
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Article
Electromagnetic properties of strange baryons in a relativistic quark model
We present some of our results for the electromagnetic properties of excited Σ hyperons, computed within the framework of the Bonn constituent-quark model, which is based on the Bethe-Salpeter approach. The seven...
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Chapter and Conference Paper
Electromagnetic properties of strange baryons in a relativistic quark model
We present some of our results for the electromagnetic properties of excited Σ hyperons, computed within the framework of the Bonn constituent-quark model, which is based on the Bethe-Salpeter approach. The se...
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Article
Static observables of relativistic three-fermion systems with instantaneous interactions
We show that static properties like the charge radius and the magnetic moment of relativistic three-fermion bound states with instantaneous interactions can be formulated as expectation values with respect to ...
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Article
Semileptonic decays of baryons in a relativistic quark model
We calculate semileptonic decays of light and heavy baryons in a relativistically covariant constituent quark model. The model is based on the Bethe-Salpeter equation in instantaneous approximation. It generat...
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Article
Charmed baryons in a relativistic quark model
We calculate mass spectra of charmed baryons within a relativistically covariant quark model based on the Bethe-Salpeter equation in instantaneous approximation. Interactions are given by a linearly rising thr...
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Article
Helicity amplitudes and electromagnetic decays of hyperon resonances
We present results for the helicity amplitudes of the lowest-lying hyperon resonances Y*, computed within the framework of the Bonn Constituent-Quark model, which is based on the Bethe-Salpeter approach. The seve...
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Article
Electric and magnetic form factors of strange baryons
Predictions for the electromagnetic form factors of the \(\Lambda\) ,
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Article
Electroweak form factors of non-strange baryons
We compute electroweak form factors of the nucleon and photon transition form factors of non-strange baryon resonances up to the third resonance region in a model with instanton-induced interaction. The calcul...
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Article
Weak decays of heavy mesons in a covariant quark model
In this paper we investigate weak decays of heavy mesons in the framework of a covariant quark model, which is based on the Bethe-Salpeter equation in instantaneous approximation. Apart from a phenomenological...
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Article
The light-baryon spectrum in a relativistic quark model with instanton-induced quark forces
This is the second of a series of three papers treating light-baryon resonances up to 3 GeV within a relativistically covariant quark model based on the three-fermion Bethe-Salpeter equation with instantaneous...
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Article
The light-baryon spectrum in a relativistic quark model with instanton-induced quark forces
This is the third of a series of papers treating light-baryon resonances up to 3 GeV within a relativistically covariant quark model based on the Bethe-Salpeter equation with instantaneous two- and three-body ...
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Article
Relativistic quark models of baryons with instantaneous forces
This is the first of a series of three papers treating light baryon resonances (up to 3 GeV) within a relativistically covariant quark model based on the three-fermion Bethe-Salpeter equation with instantaneou...
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Article
The meson spectrum in a covariant quark model
Within the framework of the instantaneous Bethe-Salpeter equation, we present a detailed analysis of light meson spectra with respect to various parameterizations of confinement in Dirac space. Assuming a line...
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Article
A relativistic quark model for mesons with an instanton-induced interaction
We present new results of a relativistic quark model based on the Bethe-Salpeter equation in its instantaneous approximation. Assuming a linearly rising confinement potential with an appropriate spinorial stru...
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Article
Quark-hadron duality and meson-meson scattering amplitudes
We investigate a special concept of quarkhadron duality in meson physics at low and intermediate energies. With a relativistic propagator for confined quarks, we calculated masses and widths of the mesons whic...
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Chapter
Applications of Instanton Induced Quark Forces in Hadron Spectroscopy and Nuclear Physics
Our present understanding of hadronic matter is obscured by the confinement problem; the fundamental constituents of hadrons should never appear as observable states and hence a relativistic theory of bound st...
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Article
Hadron spectroscopy with instanton induced quark forces
It is shown that within the framework of a non-relativistic quark model with string-like confinement and an instanton induced residual quark-quark interaction it is possible to account simultaneously for the b...
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Chapter and Conference Paper
Photon and pion scattering on the basis of quark models
Within the framework of constituent quark models of simple and complex hadrons it is possible to investigate the interrelations of scattering observables and dynamical assumptions about the underlying quark st...
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Article
The nucleus as a multiquark system
Model calculations for nuclear properties such as shell structure, magnetic moments and charge distributions are presented where quarks instead of nucleons are used as the fundamental nuclear constituents. It ...
