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nucl-th2003
Axial exchange currents and the spin content of the nucleon
D. Barquilla-Cano, A. J. Buchmann, E. Hernandez
In a chiral quark model where chiral symmetry is introduced via a non-linear sigma model, we evaluate the axial couplings g_A(0), g_A^8(0) and g_A^0(0 )related to the spin structur…
hep-ph2003
Size and shape of baryons in a large N_c quark model
A. J. Buchmann
Baryon charge radii and quadrupole moments are calculated in a quark model generalized to an arbitrary number (N_c) of colors. Several relations among the charge radii and quadrupo…