Weinberg operator contribution to the nucleon electric dipole moment in the quark model

We evaluate the contribution of CP violating gluon chromo-electric dipole moment (the so-called Weinberg operator, denoted as $w$) to electric (EDM) nucleons in nonrelativistic quark model. The CP-odd interquark potential is modeled by perturbative one-loop level exchange generated operator with massive quarks and gluons. nucleon EDM obtained solving Schr\"{o}dinger equation three-quark system using Gaussian expansion method. It found that resulting EDM, which may reasonably be considered irreducible contribution, smaller than one after $\gamma_5$-rotating anomalous magnetic mass calculated QCD sum rules. estimate total $d_n = w \times 20 \, e {\rm MeV}$ $d_p - 18 60% theoretical uncertainty.