Large-order trend of the anomalous-dimensions spectrum of trilinear twist-3 quark operators
Abstract
The anomalous dimensions of trilinear-quark operators are calculated at leading twist t=3 by diagonalizing the one-gluon exchange kernel of the renormalization-group type evolution equation for the nucleon distribution amplitude. This is done within a symmetrized basis of Appell polynomials of maximum degree M for M 1 (up to order 400) by combining analytical and numerical algorithms. The calculated anomalous dimensions form a degenerate system, whose upper envelope shows asymptotically logarithmic behavior.
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