QCD Sum Rules and the Determination of Leading Twist Non-Singlet Operator Matrix Elements
arXiv:hep-ph/9612467 · doi:10.1016/S0370-2693(97)00168-8
Abstract
We use QCD sum rules to determine directly the leading-twist non-singlet operator matrix elements based on calculations of three-point correlator functions in configuration space. We find a different result from that obtained by integrating the structure functions' expressions obtained by Belyaev and Ioffe based on calculations of four-point correlators in momentum space. The origin of this discrepancy remains unclear.
9 pages, 5 figures