FlavorKit / PreSARAH: The FlavorKit functionality is an extension of SARAH that increases the capability to handle flavor observables. The basic idea is that all information to calculate Wilson coefficients and to combine them into observables are provided by external files. These files can be edited/extended by the user and all changes are included in the SPheno output of SARAH. Therefore, it is possible for the user to extend easily the list of flavor observables calculated by the combination SARAH/SPheno. To add also new operators we provide the Mathematica package PreSARAH which makes use of FeynArts/FormCalc to calculate the generic expressions for new Wilson coefficients, and to write all necessary input files for SARAH

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