9 papers
Effects of flavor-mixings on charged kaon and pion parton distribution functions
Fabio L. Braghin, Parada T. P. Hutauruk
We investigate the charged kaon and pion parton distribution functions (PDFs) in the U(3) Nambu--Jona-Lasinio (NJL) model, considering a novel flavor-mixing interaction arising fro…
Magnetic field induced anomalous pion couplings
Fabio L. Braghin, Marcelo Loewe, Cristian Villavicencio
Effective pion-constituent quark couplings induced by relatively weak magnetic fields are calculated in the framework based in Weinberg's large Nc Effective Field Theory. These cou…
Charge dependence of mesons with flavored contact-interaction couplings
Fábio L. Braghin, Bruno El-Bennich, Fernando E. Serna
Effective interaction models of quantum chromodynamics, based on quark degrees of freedom, have been successfully employed to compute the properties of a large array of ground and…
Mixing interactions and effects in the NJL-model
F. L. Braghin
The flavor-dependent quark-antiquark contact interactions, induced by vacuum polarization and recently derived for flavor U(3) Nambu-Jona-Lasinio model, are articulated with the re…
Symmetry breaking effects in pion couplings to constituent quark currents
Fabio L. Braghin
Pseudoscalar and axial neutral and charged pion-constituent quark coupling constants are investigated with nondegenerate quark masses in different kinematical points, off shell and…
Large quark mass Euler-Heisenberg type action for QCD with quark sources and its Abelian limit
Igor de M. Froldi, Fabio L. Braghin
The quark determinant in the presence of a background gluon field is calculated in a large quark mass approach within a derivative expansion by considering quark sources. The resul…