The Minimal Supersymmetric Standard Model with R-parity violation


Benjamin Fuks

  • IPHC Strasbourg / University of Strasbourg
  • fuks@…

Description of the model & references

Our implementation keeps all the flavour-violating and helicity-mixing terms in the Lagrangian and also all the possible additional CP-violating phases. In order to deal in a transparent way with the more than 100 parameters, it follows the commonly used universal set of conventions provided by the Supersymmetry Les Houches Accord. The possible Higgs-lepton mixing terms are not included in the present implementation. However, there is no blocking point here and they could be straightforwardly added to the present model file, if necessary. However, we remind that in that case, all mixing relations of the model file must be updated, becoming in fact much more complicated.

Model files

  • RPVMSSM implementation using the superspace module (compatible with FeynRules 1.6.x)
  • af1.dat: parameter file to be read, associated to the af1 scenario (J. Andrea and B. Fuks, in preparation). In the case of the Whizard interface, this parameter file must be used instead.
  • RPV.nb: Example of a Mathematica® notebook loading the model and the parameters.

Specific instructions

  • Both Feynman and unitarity gauges are supported.
  • The flags $CKMDiag and $MNSDiag, being set to True or False, allow for CKM and PMNS matrices different from the identity or not.
  • A parameter file must be loaded before running the model, or all the parameters would have a value of -1 (ReadLHAFile[Input->"myfile"]).
  • The color structure linking three fields in the fundamental representation of SU(3) is not supported neither by CalcHep, MadGraph-4 and Whizard. Therefore, these terms must be removed from the Lagrangian before running the interface

Optimized matrix element generator models for sps1a (removal of all zero terms in the vertices) and TeX interface output

af1_ch.tgzThe model files for CalcHep.
af1_fa.tgzThe model files for FeynArts.
af1_mg.tgzThe model files for MadGraph 4.
af1_ufo.tgzThe model files in UFO format (e.g. for MadGraph 5).
af1_wo.tgzThe model files for Whizard.
af1_tex.tgzLaTeX output.

The Sherpa interface is not supported. We remind that the UDD terms are only included in the UFO.


  • To be performed...
Last modified 8 years ago Last modified on 04/20/12 13:12:55

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