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Instantaneous Bethe-Salpeter Kernel for the Lightest Pseudoscalar Mesons

Starting from a phenomenologically successful, numerical solution of the Dyson-Schwinger equation that governs the quark propagator, we reconstruct in detail the interaction kernel that has to enter the instantaneous approximation to the Bethe-Salpeter equation to allow us to describe the lightest pseudoscalar mesons as quark-antiquark bound states exhibiting the (almost) masslessness necessary for them to be interpretable as the (pseudo) Goldstone bosons related to the spontaneous chiral symmetry breaking of quantum chromodynamics.

preprint2016arXivOpen access
Wolfgang LuchaFranz F. Schöberl
hep-phnucl-th
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Wolfgang LuchaFranz F. Schöberl

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