No SPheno output possible

While SARAH can create valid SPheno code for many different models, there are some requirements on the model and some minor restrictions on the functionality of the resulting SPheno module. At the moment, those are

• Fit to low energy data: in order to perform a fit to low energy data (e.g. for fermion masses, m_Z, G_F and α_e**m) as starting point of the RGE evaluation, the following parameters must be present in the model

  1. SM Yukawa couplings for lepton and quarks
  2. One or two Higgs doublet VEVs
  3. the three SM gauge couplings and the SM particle content.

  These are used as explained here to obtain the running parameters. However, there are some attempts to relax this conditions, see

  • Models with another gauge group at the SUSY scale
  • Models with several generations of Higgs doublets

  In addition, there is still the option to use the option to generate a low scale SPheno version which performs no RGE running and no automatic matching to the SM parameters, and which is therefore more flexible.

• Flavor decomposition: with SARAH it is possible to assign a unique name to each generation of a particular field and this way treat the individual generations as independent fields, see Flavour Decomposition. That is not yet supported in the SPheno output.

• NoFlavorMixing': Mixing matrices generated with the option NoFlavorMixing can not yet be handled by the numerical code.

See also