Last modified 6 years ago Last modified on 04/02/11 23:03:30

4th Generation Model


  • Claude Duhr
    • IPPP Durham
    • claude.duhr@…

Description of the model

This model is an extension of the SM, where a new fourth generation of fermions, a t' and a b' with SM couplings, is added. The CKM matrix is a generic 3x3 matrix. The particle content and the vertices of the model are summarized in the following pdf file.

Model files

  • This is the main file.
  • 4Gen.nb: This is an example Mathematica notebook that loads the model and calculates Feynman rules.

Matrix element generator files

Below we give tarballs containing the model files generated by FeynRules for the various matrix element generaotrs for which a FeynRules interface exists. All fermion masses are put to zero, except for the top, the bottom and the Tau lepton masses. Furthermore, in the CalcHep? files, the CKM matrix is real.

4th_Generation_Complex_CKM-CH.tgzThe model files for CalcHep.
4th_Generation_Complex_CKM_FA.tgzThe model files for FeynArts.
4th_Generation_Complex_CKM_MG.tgzThe model files for MadGraph 4.
4th_Generation_Complex_CKM_SH.tgzThe model files for Sherpa.
4th_Generation_Complex_CKM_UFO.tgzThe model files in UFO format (e.g. for MadGraph 5).