Manual

• Web and offline Minimal User Manual (pdf)​ (2007) to be updated soon.

Other docs

• ​The MadGraph page in CMS (Roberto Chierici)

How to and FAQ's

General

• Structure flowchart
• How to install the whole Madgraph/MadEvent package on your machine and generate a new process
• Syntax and process input examples
• How to generate events on your machine
• Submission scripts and running on your cluster
• Testing the Complex Mass Scheme implementation at NLO
• Generate a MadLoop standalone library for the computation of one-loop matrix elements
• Apply a bias to unweighed event generations at LO
• Leading-Order MLM and CKKWL merging with MG5aMC+Pythia8 (including the associated systematics)
• Usage of MadAnalysis5 within MG5aMC

FAQ's

• How do I implement my own cuts in MadEvent ?
• How do I implement my own renormalization/factorization scales in MadEvent ?
• How do I change the mass of a particle that is assumed massless in MadGraph/MadEvent ?
• Can I just calculate the amplitudes for a (sub)process and check them point-by-point in phase space points using MadGraph ?
• Is there a limit to the maximum allowed number of diagrams? How can I change it?
• How do I generate only a subset of diagrams? What are the decay chains?
• Can I use MadGraph (or any other external matrix element generator) with Pythia for DIS?
• How many events can I generate in one run with MadEvent?
• Can I use the LHE file from Pythia as input to detector simulation?
• I generated an s-channel process p p > W+ > e+ ve, and in some events the W doesn't show up in the event record. Why is this?
• How do I read the .hep file from Pythia?
• Why don't I get the number of events I asked for from MadEvent?
• What are the default dynamic factorization and renormalization scales in MadEvent?
• I have zero result Why?
• How do I remove unwanted diagram?

Input Cards

• ​Proc card examples
• Run Card : description and examples

FAQ's

• Should I use different ids (@1,@2,...) in multiprocess proc_card or could I use the same ?
• What is bwcutoff, and why is it important for decay chains?

Interfaces and Tools

• List of interfaces and tools

FAQ's

• How I decay heavy particles in the final state?
• What is REPLACE?
• Pythia and HERWIG require a mass for all particles, while in MadGraph several are set to zero. How do I fix it?
• ​How to read the LHCO event files
• How do I get nice plots automatically when running generate_events, like I get on the web?

Matching/Merging with the Shower

• Introduction to Matching in MG/ME

FAQ's

• What are Qcut and xQcut?
• Can I change the ren and fac scales when I use the matching?

Gridpacks

• Introduction to Grid running option in MG/ME
• Technical details for setting up and running the Grid Package

FAQ's

• Can I analyse only a part of the produced sample?
• Is there a minimal statistics suggested?
• The gridpack seems sometimes very large in size? Can I improve on this?
• I have downloaded a madevent.tar.gz package. Can I create the gridpack locally?

New Physics

• ​How to create a new model with usrmod v1

FAQ's

• What are the options in MG/ME for creating a new model ?
• What are the QNUMBERS useful for?

Matrix element method

• Introduction to matrix element methods (MadWeight) in MG/ME
• MadWeight FAQ

Quarkonium Simulations

• Introduction to heavy quark bound state simulations (MadOnia) in MG/ME
• How to use it
• FAQ on MadOnia

aMC@NLO

• How to compile a Subprocess by hand?

HELAS

• The hard-to-find reference document from 1992 (PDF).​

-- Main.FabioMaltoni - 02 Mar 2009