An analysis of quark–hadron dualities in proton spin structure functions

Bloom–Gilman quark–hadron dualities of proton spin structure functions g1, g2 and gT, in inelastic resonance region, are analyzed. The contribution of the nucleon elastic peak to the local duality and the local duality of each resonance region are also discussed. It is found that the occurrences of the quark–hadron dualities of and are similar and are expected at about 2 GeV2. Moreover, our results show that the nucleon elastic peak and Δ(1232) resonance remarkably break the quark–hadron dualities.