Off-shell photon distribution amplitudes in the low-energy effective theory of QCD
作者： Xin Mo , Jueping Liu
DOI: 10.1140/EPJC/S10052-014-2787-5
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摘要: Based on the principle of Lorentz covariance transition matrix elements from an off-shell photon state to vacuum are decomposed into light-cone distribution amplitudes (DAs), in which only two transversal DAs survive on-shell limit. The eight corresponding chiral odd and even up twist four, coupling constants studied systematically instanton model quantum chromodynamics (QCD). various individual multiplied by their expressed terms correlation functions, connected with spectral densities effective quark propagator then evaluated low-energy theory derived QCD. explicit analytical expressions numerical results for given.
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