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Efremov, A.V.; Radyushkin, A.V.
Joint Inst. for Nuclear Research, Dubna (USSR). Lab. of Theoretical Physics1979
Joint Inst. for Nuclear Research, Dubna (USSR). Lab. of Theoretical Physics1979
AbstractAbstract
[en] The behaviour of the pion electromagnetic form factor (EMFF) in the framework of quantum chromodynamics (QCD) is discussed. Pion is considered to be a quark-antiquark bound state. It is proposed to use an OPE description of the bound state structure by matrix elements of certain local gauge-invariant operators. Short-distance quark interactions is proved using a direct analysis of perturbation theory in the α-parametric representation of the Feynman diagrams. It is shown that the short-distance parton picture privides a self-consistent description of the large Q2 momentum behaviour of the pion EMFF in QCD. Pion EMFF asymptotics is expressed in terms of fu fundamental constants of the theory
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1979; 29 p; 27 refs.; 14 figs.; submitted fo the 5. Interactional Meeting on Nonlocal Quantum Field Theory (Alushta 1979) and to the international seminar on Problems of High Energy Physics and Field Theory (Serpukhov, July, 1979).
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