Constituent and current quark masses at low chiral energies

Details Constituent and current quark masses at low chiral energies Constituent and current quark masses at low chiral energies

2007-10-11

arxiv.org/abs/0710.2273v1

Europhys.Lett.80:51001,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, EPL style, accepted for publication in Europhys. Lett

Scientific paper

10.1209/0295-5075/80/51001

Light constituent quark masses and the corresponding dynamical quark masses are determined by data, the Quark-Level Linear $\sigma$ Model, and infrared QCD. This allows to define effective nonstrange and strange current quark masses which reproduce the experimental pion and kaon masses very accurately, by simple additivity. Moreover, the masses of the light scalar mesons $\sigma(600)$ and $\kappa(800)$ can be obtained straightforwardly from the constituent quark masses. In contrast, the usual nonstrange and strange current quark masses employed by Chiral Perturbation Theory do not allow a simple quantitative explanation of the pion and kaon masses.

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