Resonances and higher twist in polarized lepton-nucleon scattering
J. Edelmann, G. Piller, N. Kaiser, and W. Weise
TL;DR
This paper analyzes how resonance effects and higher twist contributions influence the moments of the proton spin structure function g_1, revealing a specific Q^2 region where both effects are significant and comparable.
Contribution
It provides a detailed analysis of resonance contributions alongside higher twist effects in polarized lepton-nucleon scattering, highlighting their coexistence in certain Q^2 regions.
Findings
Resonance contributions significantly affect the moments of g_1.
Higher twist corrections coexist with resonance effects in specific Q^2 regions.
Resonance and higher twist effects are of comparable magnitude in these regions.
Abstract
We present a detailed analysis of resonance contributions in the context of higher twist effects in the moments of the proton spin structure function g_1. For each of these moments, it is found that there exists a characteristic Q^2 region in which (perturbative) higher twist corrections coexist with (non-perturbative) resonance contribution of comparable magnitude.
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