Abstract
A consistent picture for the spin contribution of the constituent quarks to a baryon is presented. The new feature is an environment dependent constituent quark energy with the natural assumption that the effective constituent quark masses may scale slightly with the mass of the baryon. SU (3) symmetry is presumably broken only with respect to the quark masses, but not in the polarization. In this case one can derive from the measured magnetic moments of the baryons in the flavor octet a negative contribution from polarized strange and (or) anti-strange quarks to the magnetic moment of the nucleon. The relevance of this to the EMC measurement of the polarized proton structure function is discussed.
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