Calculating the Fierz Transformation for Higher Orders
J. A. Maruhn, T. Buervenich, D. G. Madland
Abstract
We consider the higher-order Fierz transformation, which corresponds to expanding a product of ψΓψ terms into a sum of products of Dirac densities and currents. It is shown that the Fierz transformation can be obtained by solving a large system of linear equations with fractional complex coefficients, which is practical at least up to fourth power.
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