Analysis of the spin structure function g₂(x,Q²) and twist-3 operators
classification
✦ hep-ph
keywords
operatorsfunctionoperatorstructuretwist-3analysisanomalousbasis
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We discuss the spin-dependent structure function $g_2(x,Q^2)$ in the framework of the operator product expansion. It is noted that the anomalous dimensions and coefficient functions for the twist-3 gluon-field-dependent operators depend on the choice of the operator basis. The role played by the operators proportional to the equation of motion is clarified.
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