Quark model with chiral-symmetry breaking and confinement in the Covariant Spectator Theory

Elmar P. Biernat, M. T. Peña, J. E. Ribeiro, A. Stadler, F. Gross

Published 2015-08-18Version 1

We propose a model for the quark-antiquark interaction in Minkowski space using the Covariant Spectator Theory. We show that with an equal-weighted scalar-pseudoscalar structure for the confining part of our interaction kernel the axial-vector Ward-Takahashi identity is preserved and our model complies with the Adler-zero constraint for pi-pi-scattering imposed by chiral symmetry.