Changes between Initial Version and Version 1 of CernSummerSchool08


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Timestamp:
03/20/12 16:16:36 (8 years ago)
Author:
trac
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  • CernSummerSchool08

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     3== 2008 CERN Summer student workshop  ==
     4
     5=== Animations ===
     6   * [http://madgraph.hep.uiuc.edu/Event/ Interactive Flash version] Note you may want to zoom in!
     7   * [http://madgraph.hep.uiuc.edu/Event/fast_collisionx6.avi Fast movie (.avi) of collision]
     8   * [http://madgraph.hep.uiuc.edu/Event/collision.mov Guided movie (.mov) of collision]
     9
     10=== Exercises ===
     11Discover the Higgs at the LHC:
     12   * Find the best prediction for Higgs production at the LHC [http://maltoni.web.cern.ch/maltoni/TeV4LHC/index.html here].
     13   * Find the Higgs branching ratios [attachment:h-br.pdf here].
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     15Choose a channel and investigate signal and background:
     16
     17   1. The 4 lepton final state: %$pp \to H\to Z Z \to e^+e^- \mu^+ \mu^-$%
     18      * Signal Plots: [http://madgraph.hep.uiuc.edu/MadGraphData//tstelzer@uiuc.edu/PROC70/Events/run_02_plots.html Parton Level] [attachment:h4l-sig2.pdf Detector Level]
     19      * Background Plots: [http://madgraph.hep.uiuc.edu/MadGraphData/tstelzer@uiuc.edu/PROC73/Events/run_01_plots.html Parton Level] [attachment:h4l-lhco.pdf Detector Level]
     20   1. Top associated production %$pp \to t\bar tH$% with %$H \to b \bar b$%
     21      *  Signal + Background  Plots: [attachment:ttbb-lhe.pdf Parton Level] [attachment:ttbb-lhco.pdf Detector Level]
     22
     23=== The Challenge ===
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     25Three "black boxes" are given, in the form of event files in the LHC Olympics format and a series of selected plots:
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     27   * Box A : [attachment:A.lhco.gz Events]  Plots:  [attachment:A-lhe.pdf Parton level]  [attachment:A.pdf Detector level]
     28   * Box B : [attachment:B.lhco.gz Events]   Plots:  [attachment:B-lhe.pdf Parton level]   [attachment:B.pdf Detector level]
     29   * Box C : [attachment:C.lhco.gz Events]  Plots:  [attachment:C-lhe.pdf Parton lelve]   [attachment:C.pdf Detector level]
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     31Black 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:
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     33   * Model 1 : Extra Z (zp) : What its mass? Does it have Standard Model couplings to fermions?
     34   * Model 2 : Heavy Scalar (h): What its mass?  Is it a SM Higgs?
     35   * Model 3 : Extra W (wp+ or wp-) : What its mass? Does it have Standard Model couplings to fermions?
     36 
     37Useful extra information:
     38   * In the plots %$H_T=\sum ||p_T^{vis}|| + E_T^{miss}$%.
     39   * 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-.
     40   * 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.   
     41   * 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.
     42
     43-- Main.TimStelzer - 05 Aug 2008
     44
     45   * [attachment:plots.pdf plots.pdf]: testplots
     46
     47   * [attachment:CernSummerSchool08.ppt CernSummerSchool08.ppt]: Workshop_ppt
     48
     49   * [attachment:Worksheets.ppt Worksheets.ppt]: Worksheets
     50
     51   * [http://www.youtube.com/watch?v=j50ZssEojtM LHC_Rap]
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