QCD Sum Rules For Pion Wave Function Revisited
A. P. Bakulev, S. V. Mikhailov
Abstract
We analyze new QCD sum rules for the pion wave function ϕπ(x), obtained recently by A.V. Radyushkin in the framework of the non-local vacuum condensates method for non-diagonal correlators, and suggest a new approach for extracting wave functions of the π-meson and of its first resonances. As a result we obtain approximately the same form of the pion wave function by using two different methods and for two different ansatzes of non-local quark condensates. We predict the mass of the π'-resonance and obtain the form of its wave function. The first method uses integrated (in a sense) properties of ansatzes and may be considered as an alternative to traditional borel SR.
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