Prof. Christian Lang: Computing hadron properties ab initio
Vir: Ponedeljkov fizikalni kolokvij
Computing hadron properties ab initio
Prof. Christian Lang, Institut für Physik, Universität Graz, Graz, Austria
Most of the observable matter in the universe is made out of hadrons, the constituents of the atomic nuclei. The building blocks are quarks and gluons and the quantum field theory describing their interaction is Quantum Chromodynamics (QCD). Among the puzzles that theory should explain, is the problem of confinement, why quarks and gluons are bound to hadrons. Due to fundamental diseases of continuum QCD, the theory has to be regularized and the formulation on a space-time lattice provides such a tool. The lattice approach allows one to solve the high dimensional quantization integrals on large computers. This way we can compute masses and other properties of baryons and mesons. In my talk I plan to give a survey on some of these concepts and results.