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QCD Sum Rule Calculation of Twist-3 Contributions to Polarized Nucleon Structure Functions

E. Stein·P. Gornicki·L. Mankiewicz·A. Schaefer·W. Greiner
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Abstract

Using the framework of QCD sum rules we predict the twist-3 contribution to the second moment of the polarized nucleon structure function $g_2(x)$. As the relevant local operator depends explicitely on the gluon field, we employ a recently studied interpolating nucleon current which contains three quark field and one gluon field operator. Despite the fact that our calculation is based on the analysis of a completely different correlation function, our estimates are consitent with those of Balitsky, Braun and Kolesnichenko who used a three-quark current.

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E. Stein, P. Gornicki, L. Mankiewicz, A. Schaefer, W. Greiner. 1994-11-14. QCD Sum Rule Calculation of Twist-3 Contributions to Polarized Nucleon Structure Functions. https://doi.org/10.1016/0370-2693(94)01443-g

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