Last modified 5 years ago Last modified on 04/12/12 14:58:10

Taller Altas Energías 2008 - Madrid Particle Physics Phenomenology and the LHC


  • Fabio Maltoni (lecturer)
  • Claude Duhr (tutor)


Find the pdf of the 3 x 1.5 hours lecture:

A brief tutorial on MadGraph / MadEvent can be found here.


Answers to some of the questions asked during lecture can be found here.

Tests and Exercises

The following tests help to understand the lectures better, and to prepare for the exercises related to the different lectures:

A pdf with the exercises related to the lectures can be found here.
Some of the exercises proposed can be "solved" or checked with MadGraph / MadEvent.

Introduction to hadron collisions
  • Kinematics at the LHC: single particle quantities.
  • Jets : Di-jet kinematics and rates in pp collisions.
  • 3 Jets : Energy distributions in 3-jet events.
  • Drell-Yan : Study the rapidity asymmetry at the Tevatron.
Higgs and top
  • Higgs : Higgs phenomenology at hadron colliders.
  • top production : $t \bar t$ production, Tevatron vs LHC.

New Physics


Familiarize with MadGraph

  • Familiarize with the code by generating a few processes in QED + QCD trying to guess which diagrams appear.
  • Look at the new physics models and check the particle and interactions content.
  • Generate events for a few selected processes and look at the plots:
    • ttbar production with decays: pp>tt~>bb~mu+e-ve~vm
    • VV production: pp>VV> leptons, with V=Z,W.
    • Single top + Higgs: pp>tHj (QCD=0, QED=3, j=gudsc,p=gudscb). Show that there is a large negative interference between the diagrams.

Analysis Tools


For those interested in Monte Carlo techniques, here are some exercises:

  • Write the simplest integration function based on the definition of average and error
  • Importance sampling via an analytic transformation
  • Von Neumann's rejection method : plain and improved
  • Phase space for 1 -> n particles
  • Vegas
  • Top decay : comparison among the various methods
  • qq -> tt production

All exercises are presented and solved this Mathematica Notebook: mc101.nb. Reference: Introduction to MC methods, by Stefan Weinzierl

-- Main.FabioMaltoni - 29 Aug 2008