Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-11-08
Physics
High Energy Physics
High Energy Physics - Phenomenology
Latex, 10 pages, 4 figures, references added and typos fixed
Scientific paper
It is shown that existence of a large anomalous chromomagnetic moment of quark induced by non-perturbative structure of QCD leads to the additional contribution to exclusive $\rho$-meson electroproduction off proton target. The significant contribution coming from new type of quark-gluon interaction to the $\rho $-meson production cross section for both transversal and longitudinal polarization of virtual photon is found. Such non-perturbative contribution together with conventional perturbative two-gluon exchange allows us to describe the experimental data at low $Q^2$ for transversal polarization. However, in the longitudinal polarization case there is still some discrepancy with the data. The possible source of this deviation is discussed.
Kochelev Nikolai
Korchagin Nikolai
Nikolaev Nikolai N.
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