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| 3 | == [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 == |
| 4 | |
| 5 | === Authors === |
| 6 | |
| 7 | * Fabio Maltoni (lecturer) |
| 8 | |
| 9 | === Lectures === |
| 10 | |
| 11 | Find the pdf of the 2 x 1h lectures [attachment:top_ICTP.pdf here] |
| 12 | |
| 13 | |
| 14 | === References === |
| 15 | |
| 16 | * [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. |
| 17 | |
| 18 | * [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 : A complete document, though a bit outdated, that covers many of the interestings studies that will be performed at the LHC.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. |
| 19 | |
| 20 | * [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. |
| 21 | |
| 22 | * [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. |
| 23 | |
| 24 | === Exercises === |
| 25 | |
| 26 | Decay |
| 27 | |
| 28 | * [:TopWidth:Top width]: Calculate the width of the top quark. |
| 29 | * [:DeadCone:Radiation from heavy quarks]: the dead cone in %$e^+e^- \to Q \bar Q g$%. |
| 30 | * [:TopDecaySpinCorrelations: W+ polarization in top decays]. |
| 31 | |
| 32 | Production |
| 33 | |
| 34 | * [:tt:top production] : %$t \bar t$% production and single top at Tevatron vs LHC. |
| 35 | * [:scalar:scalar vs fermion top cross sections at hadron colliders] : Compare the production of scalar and fermion heavy color triplets in hadron collisions. |
| 36 | * [:SpinCorr:Spin Correlations in top production] |
| 37 | |
| 38 | === Light material on the heaviest quark === |
| 39 | |
| 40 | * Movies |
| 41 | * [http://madgraph.hep.uiuc.edu/Event/ Interactive Flash version] Note you may want to zoom in! |
| 42 | * [http://madgraph.hep.uiuc.edu/Event/fast_collisionx6.avi Fast movie (.avi) of collision] |
| 43 | * [http://madgraph.hep.uiuc.edu/Event/collision.mov Guided movie (.mov) of collision] |
| 44 | * Review |
| 45 | * [attachment:heavyweight.pdf Secrets of a heavyweight], by Kurt Riesselmann. |
| 46 | |
| 47 | === Familiarize with Software.MadGraph === |
| 48 | |
| 49 | A brief tutorial on Software.MadGraph / Software.MadEvent can be found [attachment:mad-tutorial.pdf here]. |
| 50 | |
| 51 | * Logon to the Software.MadGraph web site and register: http://madgraph.hep.uiuc.edu. |
| 52 | * Familiarize with the code by generating a few processes in QED + QCD trying to guess which diagrams appear. |
| 53 | * Look at the new physics models and check the particle and interactions content. |
| 54 | * Generate events for a few selected processes and look at the plots: |
| 55 | * ttbar production with decays: pp>tt~>bb~mu+e-ve~vm |
| 56 | * Single top + Higgs: pp>tHj (QCD=0, QED=3, j=gudsc,p=gudscb). Show that there is a large negative interference between the diagrams. |
| 57 | |
| 58 | Analysis Tools |
| 59 | |
| 60 | * a Fortran-based package: Software.MadAnalysis ([http://madgraph.phys.ucl.ac.be/cgi-bin/NewProcess/download.cgi Download it here]) |
| 61 | * a Mathematica-based package: [http://www.jthaler.net/olympics/software.html Chameleon]. |
| 62 | |
| 63 | === MC101 === |
| 64 | |
| 65 | For those interested in Monte Carlo techniques, here is a short Mathematica course with applications to top physics: |
| 66 | |
| 67 | * Write the simplest integration function based on the definition of average and error |
| 68 | * Importance sampling via an analytic transformation |
| 69 | * Von Neumann's rejection method : plain and improved |
| 70 | * Phase space for 1 -> n particles |
| 71 | * Vegas |
| 72 | * Top decay : comparison among the various methods |
| 73 | * qq -> tt production |
| 74 | |
| 75 | All exercises are presented and solved this Mathematica Notebook: [attachment:mc101.http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/TAE2008/mc101.nb mc101.nb]. |
| 76 | 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] |
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| 78 | |
| 79 | -- Main.FabioMaltoni - 03 Dec 2008 |
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