110 citations · 485 across the 58 of their papers we have counts for
5 papers · 1 filter
Does it make any sense to talk about a Delta-isobar?
F. Kleefeld
It is shortly investigated, on what basis an experimentally observed resonance like the Delta(1232)-isobar can be embedded into the framework of Quantum Theory (QT), i.e. Quantum F…
The light scalar mesons within quark models
Eef van Beveren, George Rupp, Nicholas Petropoulos +1
Low-energy meson-meson scattering data are a powerful testing ground for quark models. Here, we describe the behaviour at threshold of S-wave scattering-matrix singularities. The m…
Meson Form Factors and the Quark-Level Linear Sigma Model
Michael D. Scadron, Frieder Kleefeld, George Rupp +1
The quark-level linear sigma model is employed to compute a variety of electromagnetic and weak observables of light mesons, including pion and kaon form factors and charge radii,…
Consistent relativistic Quantum Theory for systems/particles described by non-Hermitian Hamiltonians and Lagrangians
F. Kleefeld
A causal, non-Hermitian, renormalizable, local, unitary and Lorentz convariant formulation of Quantum Theory (QT) (= Quantum Mechanics (QM) and Quantum Field Theory (QFT)) is devel…
Remarks on the f_0(400-1200) scalar meson as the dynamically generated chiral partner of the pion
Eef van Beveren, Frieder Kleefeld, George Rupp +1
The quark-level linear sigma model is revisited, in particular concerning the identification of the f_0(400-1200) (or σ(600)) scalar meson as the chiral partner of the pion. We dem…