== [http://cdsagenda5.ictp.trieste.it/full_display.php?email=0&ida=a07179 Signaling the Arrival of the LHC Era] [[br]][[br]] Top Quark Physics at the LHC ==
=== Authors ===
* Fabio Maltoni (lecturer)
=== Lectures ===
Find the pdf of the 2 x 1h lectures [attachment:top_ICTP.pdf here]
=== References ===
* [http://www.hep.phy.cam.ac.uk/theory/webber/QCDbook.html QCD and Collider Physics] by Keith Ellis, James Stirling, Bryan Webber (Cambridge Monographs, 1996). General introduction QCD. The section on top is an easy and efficient reading to learn the basics.
* [http://arxiv.org/abs/hep-ph/0003033 Top physics at the LHC], by Beneke et al. : A complete document, though a bit outdated, that covers many of the interestings studies that will be performed at the LHC. A very useful reference.
* [http://arxiv.org/abs/0805.1333 Top Physics at the LHC], by Werner Bernreuther : A nice and up-to-date overview on top physics at the LHC. It has also a complete reference list that can be used for further studies.
* [http://arxiv.org/abs/hep-ph/9612329 Top mass definition], by M. Smith and S.Willenbrock. This is an easy and very clear discussion that it will make you appreciate the subtleties associated to a meaningful definition of a mass of a quark.
=== Exercises ===
Decay
* [wiki:TopWidth Top width]: Calculate the width of the top quark.
* [wiki:DeadCone Radiation from heavy quarks]: the dead cone in $e^+e^- \to Q \bar Q g$.
* [wiki:TopDecaySpinCorrelations W+ polarization in top decays].
Production
* [wiki:Tt top production] : $t \bar t$ production and single top at Tevatron vs LHC.
* [wiki:Scalar scalar vs fermion top cross sections at hadron colliders] : Compare the production of scalar and fermion heavy color triplets in hadron collisions.
* [wiki:SpinCorr Spin Correlations in top production]
=== Light material on the heaviest quark ===
* Movies
* [http://madgraph.hep.uiuc.edu/Event/ Interactive Flash version] Note you may want to zoom in!
* [http://madgraph.hep.uiuc.edu/Event/fast_collisionx6.avi Fast movie (.avi) of collision]
* [http://madgraph.hep.uiuc.edu/Event/collision.mov Guided movie (.mov) of collision]
* Review
* [attachment:heavyweight.pdf Secrets of a heavyweight], by Kurt Riesselmann.
=== Familiarize with MadGraph ===
A brief tutorial on MadGraph / MadEvent can be found [attachment:mad-tutorial.pdf here].
* Logon to the MadGraph web site and register: http://madgraph.hep.uiuc.edu.
* 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
* 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
* a Fortran-based package: MadAnalysis ([http://madgraph.phys.ucl.ac.be/cgi-bin/NewProcess/download.cgi Download it here])
* a Mathematica-based package: [http://www.jthaler.net/olympics/software.html Chameleon].
=== MC101 ===
For those interested in Monte Carlo techniques, here is a short Mathematica course with applications to top physics:
* 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: [attachment:mc101.nb mc101.nb].
Reference: [http://www.slac.stanford.edu/spires/find/hep/www?eprint=hep-ph/0006269 Introduction to MC methods], by [http://wwwthep.physik.uni-mainz.de/~stefanw/ Stefan Weinzierl]
-- Main.FabioMaltoni - 03 Dec 2008