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To constructure Lagrangian and deduce Feynman
rules automatically, we have constructed a package FDC-model. It makes
theinput of the Physical model much more easy. The user do not needed to
take care of ghost fields, which will appear when the gauge fields are
quantized. In the input it is easy to change the gauge fixing terms to
another gauge, The matter interaction terms will also be generated by the
program.
The output of this part is the list of all
Feynman rules and the expression of counterterms which depends on the scheme(
choice of a set independent parameters as input quantities ). The output
are of three types, one is built in the system as the physical model. The
second is http version. The third is the latex version of the model.
The following are the examples first principle model: