International Conference on Exotic Atoms and Related Topics - EXA2014

We solve the \bar{K}NN-\pi YN coupled-channels Alt-Grassberger-Sandhas equations and examine how the \Lambda(1405) resonance manifests itself in the \pi\Sigma invariant mass distributions of \bar{K}d->\pi\Sigma N reactions. Two types of models for the two-body meson-baryon interactions are employed: an energy-independent and an energy-dependent version, both derived from the leading order...

Recent results for the Green's functions of Landau gauge QCD will be used to formulate a Poincaré-covariant Faddeev approach to baryons. The resulting three-body amplitudes for a given spin and parity describe the quark core of the respective baryons. In recent calculations the full three-body problem has been solved in a framework in which the interaction among quarks is reduced to a...

In the lightest exotic atoms – muonic and pionic hydrogen and deuterium - physical and technical problems are manifold interrelated. In pionic hydrogen the ground-state level shift and broadening give access to the pion-nucleon scattering lengths, for which the pionic deuterium level shift provides a mandatory constraint. Moreover, the determination of the level broadening in deuterium is the...

For the first time a dynamically exact calculation was performed for a hadronic atom with more than two particles. The main difficulty in the description of these systems is the simultaneous correct treatment of the strong and Coulomb interactions. To solve this problem for three-body systems Z. Papp proposed a method (see e.g. [1]), based on the expansion of the 3 Faddeev components of the...