= !FeynRules =

== Material ==

The latest version of !FeynRules: [http://feynrules.irmp.ucl.ac.be/downloads/feynrules-current.tar.gz download here].

The !FeynRules (not up-to-date) manual: [http://feynrules.irmp.ucl.ac.be/attachment/wiki/WikiStart/Manual_a4.pdf download here].

The slides associated to the lectures: [http://cp3.irmp.ucl.ac.be/~bfuks/fuks_kias.pdf download here].


== Model files ==
During the lectures, a supersymmetric (SUSY) QCD theory is implemented. 
 * The gauge group is SU(3)_c (as in QCD)
 * The field content is given by
   * Three generations of up-type quarks
   * Three generations of up-type left-handed squarks
   * Three generations of up-type right-handed squarks
   * A gluon
   * A gluino
 * The free parameters of the theory consists in
   * The masses of the particles
   * The strong coupling constant (both gs and alpha_s)
 * For the Lagrangian, see the slides.

The implementation has been performed in three different ways which will illustrate the different features of !FeynRules.
 * The good old way, using regular fields including a four-component representation for the fermions: [/attachment/wiki/SchoolKias/FeynRules/susyqcd_dirac.fr susyqcd_dirac.fr]
 * A better approach, using regular fields including a two-component representation for the fermions: [/attachment/wiki/SchoolKias/FeynRules/susyqcd_dirac.fr susyqcd_weyl.fr] 
 * The best method for supersymmetric theoric, using superfields: [/attachment/wiki/SchoolKias/FeynRules/susyqcd_dirac.fr susyqcd_sf.fr]

In the case you want to start from your own Weyl fermion implementation to get the superfield implementation, you will have to replace right-handed Weyl quarks and right-handed squarks by their charge-conjugate counterparts. Since this will not be performed explicitly during the lectures, you can either do it yourself or download the add-on to merge to your model file [/attachment/wiki/SchoolKias/FeynRules/addon.fr here].


== Tutorial ==

Documentation for projects 4 and 5:
 * [/attachment/wiki/SchoolKias/FeynRules/PhysRevD.48.2182.pdf Paper on triple gauge boson interactions].
 * [/attachment/wiki/SchoolKias/FeynRules/zprime.pdf Notes on E_6 inspired Z'].