QCD factorization of quasi generalized gluon distributions

We study the factorization relations between quasi gluon GPDs and twist-2 GPDs. The perturbative coefficient functions are obtained at one-loop level. They free from any collinear- or I.R. divergences. Unlike case of quark one-loop, we have to add ghost contributions for in order obtain gauge-invariant results. In general, operators will be mixed beyond tree-level. Our work shows that mixing pattern nonlocal is same as local operators, i.e., considered with BRST-variation involving EOM operator. all Taking forward limit, also PDFs PDFs.