== 2010 CERN Summer student workshop ==

=== Animations ===
   * [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]

=== Exercises ===

Discover the Higgs at the LHC:
   * Find the best prediction for Higgs production at the LHC [http://maltoni.web.cern.ch/maltoni/TeV4LHC/index.html here].
   * Find the Higgs branching ratios [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08/h-br.pdf here].

Choose a channel and investigate signal and background:

   1. The 4 lepton final state: %$pp \to H\to Z Z \to e^+e^- \mu^+ \mu^-$% 
      * Signal Plots: [http://madgraph.hep.uiuc.edu/MadGraphData//tstelzer@uiuc.edu/PROC70/Events/run_02_plots.html Parton Level] [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08/h4l-sig2.pdf Detector Level]
      * Background Plots: [http://madgraph.hep.uiuc.edu/MadGraphData/tstelzer@uiuc.edu/PROC73/Events/run_01_plots.html Parton Level] [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08//h4l-lhco.pdf Detector Level]
   1. Top associated production %$pp \to t\bar tH$% with %$H \to b \bar b$% 
      * Signal + Background Plots: [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08//ttbb-lhe.pdf Parton Level] [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08//ttbb-lhco.pdf Detector Level]

=== The Challenge ===

Three "black boxes" are given, in the form of event files in the LHC Olympics format and a series of selected plots:

   * Box A : [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08/A.lhco.gz Events] Plots: [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08//A-lhe.pdf Parton level] [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08//A.pdf Detector level]
   * Box B : [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08//B.lhco.gz Events] Plots: [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08//B-lhe.pdf Parton level] [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08/B.pdf Detector level]
   * Box C : [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08//C.lhco.gz Events] Plots: [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08//C-lhe.pdf Parton level] [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08//C.pdf Detector level]

Black boxes contain only signal events. The students are asked to pair up the boxes above with the following models and also answer to the questions:

   * Model 1 : Extra Z (zp) : What its mass? Does it have Standard Model couplings to fermions?
   * Model 2 : Heavy Scalar (h): What its mass? Is it a SM Higgs?
   * Model 3 : Extra W (wp+ or wp-) : What its mass? Does it have Standard Model couplings to fermions?

Useful extra information:
   * In the plots %$H_T=\sum ||p_T^{vis}|| + E_T^{miss}$%.
   * A SM-like Z' would decay (more or less democratically) into: jet jet (uu~,cc~,dd~,ss~,bb~), t tbar (tt~), lept+lept- (e+e-,mu+mu-,ta+ta-), neutrino anti-neutrino (ve ve~,vm vm~,vt vt~). It could also have couplings to SM W and Z, and in that case would decay in to ZZ and W+W-.
   * An Higgs couple to particles with a strength which is proportional to the particle masses. A SM-like heavy H would decay in to t tbar (tt~), W+W-, ZZ.
   * A SM-like W'+ would decay into: jet jet (ud~,cs~), t b (tb~), lept neutrino (e+ ve , mu+ vm, ta+ vt). It could also have couplings to SM W and Z, and in that case would decay in to ZW.

* [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/CernSummerSchool08//plots.pdf plots.pdf]: testplots

* [attachment:CernSummerSchool09.pdf CernSummerSchool10.pdf]: 2010 presentation

* [attachment:CernSummerSchool10x.pptx CernSummerSchool10x.pptx]: Lecture Slides

* [attachment:Worksheets10.pdf Worksheets10.pdf]: Worksheets

* [http://www.youtube.com/watch?v=j50ZssEojtM LHC_Rap]

-- Main.TimStelzer - 2010-07-29