hrvatski

Jedna primjena "Mathematice" u teorijskoj fizici elementarnih čestica

In the elementary particle physics there is a constant need for calculation of the large number of Feynman diagrams, i.e. of contributions to the quantum mechanical probability amplitude of some physical process. Stages of this procedure are: (1) generation of all contributing diagrams, (2) determination of corresponding amplitudes, (3) calculation of traces of products of Dirac matrices, (4) algebraic simplification of expressions using kinematical properties of the physical process, (5) final analitical or numerical evaluation of the amplitude. By presenting software packages FeynArts, FeynCalc, FormCalc, LoopTools and our extensions of some of these, we show how Mathematica enables complete automatization of the whole procedure.

Feynmanovi dijagrami; FeynArts; FeynCalc; FormCalc; LoopTools

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