Version 11 (modified by claudeduhr, 10 years ago) (diff)


Working Group 2 - Interface development

  • I. Python interface.
    • Description: development of a FeynRules Python interface, which will be used by MG and Herwig
    • Names: Claude, David, Olivier, Will.
    • Status:
      • We decided that a model is a Python package, where particles, parameters, etc. are represented as objects. The package will be self-contained in the sense that it provides everything required for the module (definition of the classes, etc.)
      • For the moment particles and parameters are written automatically from FR.
      • We created a "dummy model", based on the Fr implementation of the Hidden Abelian Higgs model of FR, where we added a vertex u,u,Z' by hand.
    • To-do:
      • Some tuning for the parameters needs to be done, especially "Waterfall structure".
      • Some python files need to be added to the package, e.g. , functions like sqrt, sin, etc.
      • We have now the option to matrices as matrices, rather than component by component. This needs to be discussed and developped further.
      • The parts dealing with the vertices, couplings, etc. need to be written. Will is working on splitting the FR vertices into triplets according to color, lorentz_structure and coupling. After this is done, Claude will create the writing routines for vertices.
      • David is developing the Herwig part of the Python interface.

  • II. Helas.
    • Description: automatized generation of Helas routines from FeynRules, both in Fortran for MG and in C++ for Herwig.
    • Names: Olivier, Claude, Will, Priscila, David
    • Status:
      • We have a defined format for the FR input
      • We have produce our first generated automaticaly Helas Routine from FeynRules.
      • Testing those routines is in progress
    • To-do:
      • Python Optimization (code quite slow at the time)
      • Regenerate all the Helas routine and test those against the old one
      • Implement the Scalar in the FortranWriter
      • Implement Helas Optimization
      • Implement a mode for complex couplings/masses
  • III. FeynArts interface.
    • Description: inclusion of the higher dimensional operators in FeynArts.
    • Names: Celine, Thomas
    • Status:
      • Format of the FR output for the dirac indices is defined (Implementation in FR in progress).
      • addition of the dirac indices in FeynArts/FormCalc? in progress.
      • Test in progress : EQCD done (FA only), composite top (FR files used in FA), BFSM (comparison with stock version started).
    • To-do:
      • Define format for the levi-civita tensor and implement it.
      • generate declaration file for FormCalc?.
      • Merging of the vertices in FR.
      • Test SILH + renormalizable theories.

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