Operator product expansion coefficient functions in terms of composite operators only. Nonsinglet case

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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Derivation of the main formula is improved. References are added. To appear in Physical Review D

Scientific paper

10.1103/PhysRevD.71.085020

A new method for calculating the coefficient functions of the operator
product expansion is proposed which does not depend explicitly on elementary
fields. Coefficient functions are defined entirely in terms of composite
operators. The method is illustrated in the case of QCD nonsinglet operators.

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