Create your own model by FeynRules

FeynRules

Single model file (.fr) -> files for multiple HEP tools

CalcHep / CompHep

FeynArts / FormCalc

Sherpa

Universal FeynRules Output (for MadGraph5_aMC@NLO)

Whizard / Omega

Thus model files has a lot of information and should be carefully made.

How to create a new "Model" file?

Do not create a model by your own!

A model file has

many gauge-syms,

many many particles,

many many many interactions,

many many many many parameters,

which you have to input CORRECTLY........ Painful and Boring.

Then what.

Use models file created by professionals.

Modify or Extend them.

Do not install full of the new particles.

Install only what you really needs, or what are irrelevant to the processes.

Let's see the (pro-made) model file for the Standard Model

A model file has

Indexes (to make the model simpler)

Gauge symmetries

Particles

Parameters

Lagrangian