Dynamical coupled-channel approaches on a momentum lattice

作者：Doering M^*; Haidenbauer J; Meissner U G; Rusetsky A

来源：European Physical Journal A, 2011, 47(12): 163.

DOI：10.1140/epja/i2011-11163-7

Dynamical coupled-channel approaches are a widely used tool in hadronic physics that allow to analyze different reactions and partial waves in a consistent way. In such approaches the basic interactions are derived within an effective Lagrangian framework and the resulting pseudo-potentials are then unitarized in a coupled-channel scattering equation. We propose a scheme that allows for a solution of the arising integral equation in discretized momentum space for periodic as well as anti-periodic boundary conditions. This permits to study finite-size effects as they appear in lattice QCD simulations. The new formalism, at this stage with a restriction to S-waves, is applied to coupled-channel models for the sigma(600), f(0)(980), and a(0)(980) mesons, and also for the Lambda(1405) baryon. Lattice spectra are predicted.

• 出版日期2011-12