the short-distance expansion for the T-product of two (pseudo) vector currents. The corrections are found to be relatively small, which indicates a good convergence of the corresponding perturbative series.
We calculate two-loop coefficient functions of the operators G μvaG μva, m Ψ Ψ and m4 in the short-distance expansion for the T-product of two (pseudo)vector currents. The corrections are found to be relatively small, which indicates a good convergence of the corresponding perturbative series.