# Constituent and current quark masses at low chiral energies - High Energy Physics - Phenomenology

Abstract: Light constituent quark masses and the corresponding dynamical quark massesare determined by data, the Quark-Level Linear $\sigma$ Model, and infraredQCD. This allows to define effective nonstrange and strange current quarkmasses which reproduce the experimental pion and kaon masses very accurately,by simple additivity. Moreover, the masses of the light scalar mesons$\sigma600$ and $\kappa800$ can be obtained straightforwardly from theconstituent quark masses. In contrast, the usual nonstrange and strange currentquark masses employed by Chiral Perturbation Theory do not allow a simplequantitative explanation of the pion and kaon masses.

Author: M. D. Scadron, F. Kleefeld, G. Rupp

Source: https://arxiv.org/