Given the sheer multitude of HEP programs that are publicly available or can be obtained upon request by contacting the authors, it may not be easy to decide which tool fits best for one’s project.
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In practice, different tools are required to automatize different parts of the calculation and it is often far from trivial to interface and employ multiple codes in an efficient, correct and consistent way. In principle, every single step of a typical HEP calculation from deriving Feynman rules for the given Lagrangian till obtaining explicit results for a particular observable can be carried out using computer codes. For the given theory each Feynman diagram can be converted to an algebraic expression (e. g. scattering amplitude) using a set of well-defined rules (Feynman rules).
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14, 631 (2017), arXiv:hep-ph/0609282.įeynman diagrammatic expansion is one of the most common techniques to approach perturbative calculations in modern theoretical high energy physics (HEP). G. Sulyok, A closed expression for the UV-divergent parts of one-loop tensor integrals in dimensional regularization, Phys. Hahn, Generating Feynman diagrams and amplitudes with FeynArts 3, Comput. Restrictions: In the case of multi-particle (beyond 1 → 3 and 2 → 3) or multiloop processes, it is not advisable to perform all algebraic evaluations only with FeynCalc and Mathematica. The algorithm of is added to extract UV-poles from scalar 1-loop integrals (Passarino–Veltman functions) with an arbitrary number of external legs. The same goes for FeynArts-generated diagrams with 4-fermion operators. Amplitudes involving Majorana fermions (both written by hand or obtained with FeynArts can be evaluated out-of-the box. Algebraic manipulations of Dirac matrices and spinors with explicit Dirac indices are now available. Summary of revisions: FeynCalc can be loaded with arbitrary packages into the same Mathematica kernel without causing shadowing issues. Reasons for the new version: Highly improved interoperability with other packages, new routines for Dirac algebra and loop integral evaluation. Solution method: The required algorithms and algebraic identities are implemented in Wolfram Mathematica.
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Nature of problem: Symbolic calculation of Feynman diagrams in particle physics and suitable standalone expressions in Quantum Field Theory. Commun., 207, 432–444, (2016).ĭoes the new version supersede the previous version?: Yes Journal reference of previous version: Comput. Programming language: Wolfram Mathematica 8 and higherĮxternal routines/libraries: FeynArts