FeynRules

(Difference between revisions)

Revision as of 10:18, 25 June 2009

The FeynRules project

Implementation and validation of new models
- B-L: implemetation completed, validation in MC tools ongoing (L. Basso).
- Dirac gauginos: Dirac gluinos are implemented. The implementation of the full model is ongoing (C. Duhr, P. Fox, B. Fuks, G. Kribbs, A. Martin).
- MSSM: Validation of the model in Sherpa has started and is ongoing (C. Duhr, B. Fuks, S. Schumann).
- NMSSM: Implementation of the model is complete. Validation again Whizard will soon start (Herwig++?) (C. Duhr, B. Fuks, J. Reuter).
- RPV MSSM: Implementation is achieved (C. Duhr, B. Fuks).

Validation procedure
- Any model can be put on the FeynRules website.
- Each model will be rated regarding the validation performed, from zero to four stars.
- Guidelines for validation
  - First star [DOC]
    - The model should be documented (description, references to the Lagrangian and field content, ...).
    - If the model is only a theory fragment, this should be stated.
    - Consistency of the input parameters (external vs. internal, all external plus a spectrum generator,...).
  - Second star [THEO]
    - Basic sanity checks: hermiticity of the Lagrangian, signs in the covariant derivatives, ...
    - If the Feynman rules are available in the literature, comparison (+ references).
    - If any theoretical work is available in the literature, reproduction (handmade or FeynArts/FormCalc or any other symbolic tool).
  - Third star [1MC]
    - Check some basic processes like Drell-Yan or bhabha scattering and that the MC is producing reliable results (running of alpha_s, QED running, ...).
    - Gauge invariance (e.g. several gauges in CalcHep, numerical checks in other MC tools).
    - Reproduce SM results for sectors independent on new physics.
    - Behaviour at high energy (unitarity cancellations).
    - Produce numerical tables for cross sections or any observables for future references.
  - Fourth star [nMC]
    - Show that the [1MC] step can be reproduced by more than one MC generators.
    - Produce some comparison tables for future references.

@@ Line 26: / Line 26: @@
 **** If the Feynman rules are available in the literature, comparison (+ references).
 **** If any theoretical work is available in the literature, reproduction (handmade or FeynArts/FormCalc or any other symbolic tool).
-*** ''Second star'' [THEO]
+*** ''Third star'' [1MC]
+**** Check some basic processes like Drell-Yan or bhabha scattering and that the MC is producing reliable results (running of alpha_s, QED running, ...).
+**** Gauge invariance (e.g. several gauges in CalcHep, numerical checks in other MC tools).
+**** Reproduce SM results for sectors independent on new physics.
+**** Behaviour at high energy (unitarity cancellations).
+**** Produce numerical tables for cross sections or any observables for future references.
+*** ''Fourth star'' [nMC]
+**** Show that the [1MC] step can be reproduced by more than one MC generators.
+**** Produce some comparison tables for future references.