Martina Joergler (Graz):

Bethe-Salpeter-equation studies of meson properties

Abstract:

The framework of Dyson-Schwinger and Bethe-Salpeter equations allows a covariant, nonperturbative treatment of mesons as bound-states in QCD. A numerical approach to this infinite coupled set of linear as well as nonlinear integral equations requires a truncation which correctly implements the symmetries of QCD by satisfaction of the corresponding Ward-Takahashi and Slavnov-Taylor identities. In such a model, which is applicable from the chiral limit to the b-quark mass, observables like masses and decay constants are calculated to high accuracy, such that it is easy to compare with experimental data and corresponding results from other approaches, in particular lattice QCD. Recent highlights will be presented including a focus on the computational aspects of the approach.

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