Abstract.
We suggest and discuss in detail a multi-quark three-flavor Lagrangian of the Nambu-Jona-Lasinio type, which includes a set of effective interactions proportional to the current quark masses. It is shown that within the dynamical chiral symmetry-breaking regime, the masses of the pseudo-Goldstone bosons and their chiral partners, members of the low-lying scalar nonet, are in perfect agreement with current phenomenological expectations. The role of the new interactions is analyzed.
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Osipov, A.A., Hiller, B. & Blin, A.H. Light quark masses in multi-quark interactions. Eur. Phys. J. A 49, 14 (2013). https://doi.org/10.1140/epja/i2013-13014-y
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DOI: https://doi.org/10.1140/epja/i2013-13014-y