Eur. Phys. J. A (2013) 49: 14
https://doi.org/10.1140/epja/i2013-13014-y

Letter

Light quark masses in multi-quark interactions

Centro de Fısica Computacional, Departamento de Fısica da Universidade de Coimbra, 3004-516, Coimbra, Portugal

^* e-mail: osipov@nu.jinr.ru

Received: 5 December 2012
Accepted: 8 January 2013
Published online: 25 January 2013

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.