Two-loop anomalous dimensions for the structure function h1

Abstract

Chiral-odd structure function h1 is expected to be measured in polarized Drell-Yan process. We calculate two-loop anomalous dimensions for h1 in the minimal subtraction scheme. Dimensional regularization and Feynman gauge are used for calculating the two-loop contributions. Our results are important in studying Q^2 dependence of h1.

Figures (4)

• Figure 1: Feynman rules for zero, one, and two gluon vertices.
• Figure 2: Contributions to the two-loop anomalous dimension.
• Figure 3: Two-loop contributions to the quark self-energy.
• Figure 4: Lorentz and color indices are shown with momenta for the diagram in Fig. \ref{['diag']}(d).