SHIROKOV CANONICAL PARAMETERIZATION OF LOCAL OPERATORS IN MODERN PROBLEMS OF THE HADRON STRUCTUREстатьяИсследовательская статья
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Аннотация:We discuss the general method of parameterization of matrix elements of local operators developed byYu. M. Shirokov. This method is a core of one of the successful variants of the relativistic composite modeldeveloped by the authors, namely, the instant form of Dirac relativistic dynamics, which gives good resultswhen describing composite quark and nucleon systems. Using the Shirokov parameterization, we constructoperators of the electromagnetic current and the energy–momentum tensor of a composite system takingthe Lorentz covariance and the conservation into account. As an example, we derive formulas for theelectric and gravitational form factors of a pion.