## Vacuum structure and QCD sum rulesThe method of the QCD sum rules was and still is one of the most productive tools in a wide range of problems associated with the hadronic phenomenology. Many heuristic ideas, computational devices, specific formulae which are useful to theorists working not only in hadronic physics, have been accumulated in this method. Some of the results and approaches which have originally been developed in connection with the QCD sum rules can be and are successfully applied in related fields, such as supersymmetric gauge theories, nontraditional schemes of quarks and leptons etc. The amount of literature on these and other more basic problems in hadronic physics has grown enormously in recent years. This volume presents a collection of papers which provide an overview of all basic elements of the sum rule approach and priority has been given to those works which seemed most useful from a pedagogical point of view. |

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### Contents

Historical survey and physical picture | 1 |

Foundations of the QCD sum rule method and sample applications | 17 |

Coefficients in the operator product expansion | 159 |

Copyright | |

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### Common terms and phrases

A.I. Vainshtein accuracy amplitudes anomalous dimension approximation asymptotic freedom axial baryon Borel transform calculation charmonium chiral coefficients consider continuum contribution corresponding coupling constant cross section density derivatives determined diagrams discussed electromagnetic energy equation estimate experimental expression external field form factors formula GeV2 gluon condensate gluon field gluonic graphs Green function hadronic heavy quarks instanton integral interaction Lett light quarks M.A. Shifman matrix elements meson momentum non-perturbative effects normalization point Novikov Nucl nucleon obtained operator expansion parameters perturbation theory phenomenological Phys physical pion polarization operator potential power corrections power terms predictions problem propagator proton pseudoscalar QCD sum rules quantum numbers quark condensate quark mass quarkonium Radyushkin region resonance scalar sect Smilga structure subsect sum rule method tensor theoretical tion two-point functions u-quark V.I. Zakharov vacuum expectation values vector current Voloshin wave function width zero