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

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.

preprint2015arXivOpen access
Elmar P. BiernatM. T. PeñaJ. E. RibeiroA. StadlerF. Gross
hep-phnucl-th
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Elmar P. BiernatM. T. PeñaJ. E. RibeiroA. StadlerF. Gross

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