Studies of meson production at threshold in the hadron-hadron interaction began in the
fifties when sufficient energies of accelerated protons were available. A strong …

Invariant mass spectra of di-electrons stemming from bremsstrahlung processes are
calculated in a covariant diagrammatical approach for the exclusive reaction Dp→ pspnpe+ …

The production of the Λ-and Σ 0-hyperons has been measured via the pp→ pK+ Λ/Σ 0
reaction at the internal COSY-11 facility in the excess energy range between 14 and 60 …

Hyperon production in the threshold region was studied in the reaction pp→ K+ Λp using the
time-of-flight spectrometer COSY-TOF. Exclusive data, covering the full phase-space, were …

We calculate the spectral function A ρ of the ρ meson in nuclear matter. The calculation is
performed in the low-density approximation, where the in-medium self-energy Σ med is …

Within an effective Lagrangian model, we present calculations for cross sections of the
dilepton production in proton-proton and proton-neutron collisions at laboratory kinetic …

We investigate photoproduction of η mesons off protons and neutrons within a coupled-
channels effective-Lagrangian method that is based on the K-matrix approach. The two …

A study of the strangeness production reaction pp→ pK+ Λ for excess energies of ε≤
150MeV, accessible at high-luminosity accelerator facilities like COSY, is presented …

Hyperon production in the threshold region was studied in the reaction pp→ K+ Λp using the
time-of-flight spectrometer COSY-TOF. Exclusive data, covering the full phase-space, were …

The charge form factor and weak decay constant of the pion as well as the pion-quark
coupling constant in symmetric nuclear matter are explored in the framework of the Nambu …