'''EWFF4DM: DM effective field theory with hypercharge electromagnetic form factors'''


'''Authors''' 

Andrew Cheek  [[BR]]
    * andrew.cheek@uclouvain.be [[BR]]
Luca Pagani  [[BR]]
    * luca.pagani7@unibo.it [[BR]]
Ken Mimasu [[BR]]
    * ken.mimasu@uclouvain.be [[BR]]
Chiara Arina [[BR]]
    * chiara.arina@uclouvain.be [[BR]]


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'''Model description'''

We consider the effective interactions of a fermionic singlet dark matter particle with the SM hypercharge gauge boson field. The corresponding form factor operators up to dimension-6 are given by


for Majorana particles, indicated by χ, and by


for Dirac dark matter, denoted by ψ. The Cj are the dimensionless Wilson coefficients for the dimension-6 anapole moment (CA), for the dimension-5 the electric and magnetic dipole moments (Cel) and (CM) and for the dimension-6 charge radius operator (Ccr).

More information can be found in arXiv: [hep-ph].

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'''Description of the Model Files'''


* Feynrules model file [[BR]]
  * EWFF4DM.fr, Main FeynRules model for the model, it already contains the SM Feynrules model.[[BR]]

* UFO model files [[BR]]
  * EWFF4DM_UFO.tar.gz, Standalone LO UFO folder in the EWFF4DM models.[[BR]]

The actual files are provided in attachment.