= The Inert Doublet Model =

== Implementation authors ==
* Andreas Goudelis (andreas.goudelis@lapth.cnrs.fr)
  * Laboratoire d'Annecy-le-Vieux de Physique Theorique, Annecy, France
* Björn Herrmann (herrmann@lapth.cnrs.fr)
  * Laboratoire d'Annecy-le-Vieux de Physique Theorique, Annecy, France
* Oscar Stal (oscar.stal@fysik.su.se)
  * 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 Z,,2,, 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, which can be 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 Z,,2,,-odd particles must be named with tildes. In other programs, the user might have to remove them.