摘要: Attempting to understand the origin of intrinsic spin proton and neutron has been an active area both experimental theoretical research for past twenty years. With confirmation that were not elementary particles, physicists challenged with task explaining nucleon’s in terms its constituents. In a simple constituent picture one can decompose as $$J_z^N = S_z^q + L_z^q S_z^g L_z^g {1 \over 2}$$ (1.1) where Sz Lz represent orbital angular momentum respectively quarks gluons. A non-relativistic quark model (as described below) gives directly S q z 1/2 all other components 0.
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