The constituent quark model revisited. Masses and magnetic moments

Eight relations between masses and magnetic moments of nonstrange and singly strange hadrons are obtained from a simple constituent quark model in which masses are the sums of the constituent quark effective masses and a hyperfine interaction inversely proportional to the product of these same masses. The analysis pinpoints the physical assumptions needed for each relation and offers a provocative challenge for the search for a more fundamental description based on QCD with two new surprisingly successful mass relations following from the extreme assumption that the same effective mass parameter appears in the additive mass term, the hyperfine interaction, and the quark magnetic moment, both in mesons and baryons. (orig.)