Magnetic moment of the rho-meson in QCD sum rules: perturbative corrections

Abstract

The magnetic moment of the rho-meson is calculated in the framework of QCD sum rules in external fields. Perturbative corrections are taken into account. Bare loop calculations (parton model) give the value 2.0. The nonperturbative effects (operators of dimension 6) result in negative contribution, whereas perturbative corrections -- positive one. The final answer is 1.8.

Comments: 10 pages, 5 figures