== The Standard Model ==
=== Authors ===
* Claude Duhr
* ETH, Zurich
* duhrc@itp.phys.ethz.ch
* Neil Christensen
* Michigan State University
* neil@pa.msu.edu
* Benjamin Fuks
* IPHC Strasbourg / University of Strasbourg
* benjamin.fuks@iphc.cnrs.fr
=== Model Files ===
* [/attachment/wiki/StandardModel/SM.fr SM.fr] : This is the new main file (!FeynRules versions >= v1.6.2).
* [/attachment/wiki/StandardModel/SM_old.fr SM_old.fr] : This is the older implementation (!FeynRules versions < v1.6.2).
=== Model Restrictions ===
* [/attachment/wiki/StandardModel/Massless.rst Massless.rst]: Only the top, bottom and charm quarks, and the tau lepton are massive.
* [/attachment/wiki/StandardModel/DiagonalCKM.rst DiagonalCKM.rst]: The CKM maktrix is diagonal.
* [/feynrules/attachment/wiki/StandardModel/Cabibbo.rst Cabibbo.rst]: 3rd generation mixing is off.
=== Instructions ===
The Standard Model (SM) is implemented in both Feynman and unitary gauge. A switch {{{FeynmanGauge}}} has been created. To switch between the two simply set {{{FeynmanGauge = True/False}}} inside your mathematica notebook after loading the model but before doing any calculations with it (finding vertices for example.) {{{FeynmanGauge}}} is set to {{{False}}} by default.
=== Examples ===
* [/attachment/wiki/StandardModel/SM.nb SM.nb]: This is an example Mathematica® notebook that loads SM.fr and calculates Feynman rules.
=== Validation ===
The SM implementation was extensively tested on various 2-to-2 processes. A selection is shown in [/attachment/wiki/StandardModel/XS1.jpg this table]. (Note that the discrepancy with MG stock simply comes from the fact that MG stock has the 4 higgs vertex not implemented).
=== Interfaces ===
This model implementation is known to work with the following interfaces:
* [wiki:FeynArtsInterface FeynArts Interface]
* [wiki:MadGraphInterface MadGraph Interface]
* [wiki:CalcHepInterface CalcHEP/CompHEP]
* [wiki:SherpaInterface Sherpa]