https://doi.org/10.1051/epjconf/201611305004
Quark model with chiral-symmetry breaking and confinement in the Covariant Spectator Theory
1 CFTP, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
2 Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
3 CeFEMA, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
4 Departamento de Física, Universidade de Évora, 7000-671 Évora, Portugal
5 Thomas Jefferson National Accelerator Facility (JLab), Newport News, Virginia 23606, USA
a e-mail: elmar.biernat@tecnico.ulisboa.pt
Published online: 25 March 2016
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 π-π-scattering imposed by chiral symmetry.
© Owned by the authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
