The Inert Doublet Model

Implementation authors

• Andreas Goudelis (andreas.goudelis@…)
  • Laboratoire d'Annecy-le-Vieux de Physique Theorique, Annecy, France
• Björn Herrmann (herrmann@…)
  • Laboratoire d'Annecy-le-Vieux de Physique Theorique, Annecy, France
• Oscar Stal (oscar.stal@…)
  • Oscar Klein Center, Stockholm, Sweden

(work done in part at the Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany)

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Model description

This is the FeynRules model file for the Inert Doublet Model, , i.e. the Standard Model augmented by an additional complex scalar SU(2) doublet and an unbroken Z₂ symmetry under which all SM particles are even while the extra doublet is odd.

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Files

• InertDoublet.tar : the FeynRules model files.
• IDMload.nb : example mathematica notebook to load the file.

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Validation

• All sectors of the model has been cross-checked against an independent implementation with the SARAH package. A very large number of processes involving all model particles and vertices were computed, and perfect agreement was found.

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References

If you use these model files, please cite

• A. Goudelis, B. Herrmann, O. Stal, Dark matter in the Inert Doublet Model after the discovery of a Higgs-like boson at the LHC, JHEP 1309 (2013) 106, ​arXiv:1303.3010 [hep-ph].

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Notes

• The implementation comes in both Feynman and Unitary gauge, chosen from within the InertDoublet.fr file.
• The model file follows the older (pre v1.8) FeynRules notations, but works perfectly with version 1.8.
• The inert doublet particles carry tildes (~) in their particle names. This is in compliance to the CalcHEP/MicrOMEGAs conventions, in which all Z₂-odd particles must be named with tildes. In other programs, the user might have to remove them.