6 papers
Spin-5/2 resonance effects in a coupled channel nucleon resonance analysis
V. Shklyar, G. Penner, U. Mosel
Spin-$\ffh$ resonance contributions in pion-nucleon scattering are investigated within the coupled channel -matrix approach for c.m. energies up to 2 GeV. All previou…
What is the Correct pi^- p -> omega n Cross Section at Threshold?
G. Penner, U. Mosel
The pi^- p -> omega n threshold cross section measured in the seventies resisted up to now a consistent theoretical description in line with experiment, mainly caused by too large…
Missing Nucleon Resonances in Kaon Production with Pions and Photons
C. Bennhold, A. Waluyo, H. Haberzettl +3
Resonances with strong couplings to strangeness channels are investigated in a coupled-channels framework of kaon production with pions and photons. We find evidence for an additio…
Nucleon Resonances in Meson Nucleon Scattering with Strangeness Production
A. Waluyo, C. Bennhold, H. Haberzettl +3
An effective Lagrangian model in a coupled channels framework is applied to extract nucleon resonance parameters. In the K-matrix approximation, we simultaneously analyze all the a…
Nucleon Resonances in Kaon Photoproduction
C. Bennhold, T. Mart, A. Waluyo +4
Nucleon resonances are investigated through the electromagnetic production of K-mesons. We study the kaon photoproduction process at tree-level and compare to a recently developed…
Pion Electroproduction and Pion-induced Dileptonproduction on the Nucleon
Gregor Penner, Thomas Feuster, Ulrich Mosel
By introducing electromagnetic formfactors in the spacelike region we extend an effective, gauge invariant Lagrangian model considering Born terms, baryon resonances up to 1.7 GeV…