Neutron Structure Function at high-x Valence-quark distributions at x=1 –Fixed point under DGLAP evolution –Strong discriminator between theories Algebraic formula –P 1 p,s = contribution to the proton s charge arising from diagrams with a scalar diquark component in both the initial and final state –P 1 p,a = kindred axial-vector diquark contribution –P 1 p,m = contribution to the proton s charge arising from diagrams with a different diquark component in the initial and final state.
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