Changes between Initial Version and Version 1 of Francqui


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03/20/12 16:15:43 (7 years ago)
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  • Francqui

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     3== 2011 VUB Francqui Chair: LHC Phenomenology ==
     4
     5=== Title ===
     6
     7LHC phenomenology: a journey from standard model measurements to new physics discoveries
     8
     9=== Authors ===
     10
     11Fabio Maltoni (lecturer)
     12
     13=== Lectures ===
     14
     15Find the pdf of the 5 lectures:
     16
     17   * [attachment:VUB-francqui-public.pdf Public Lecture] : An expedition to the !TeraWorld : challenges and opportunities at the LHC
     18   * [attachment:Francqui-1.pdf 1st and 2nd Lecture] : QCD at work: simulating events at the LHC
     19   * [attachment:Francqui-2.pdf 3nd Lecture] : Precision physics and BEH boson phenomenology
     20   * [attachment:Francqui-4.pdf 4th Lecture] : The importance of being top & Hunting for New Physics
     21
     22=== References ===
     23
     24   * [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).
     25   * [:FurtherReading:Perspectives on LHC physics, Ed. by G. Kane and A. Pierce].
     26
     27=== Higgs notebooks ===
     28
     29   1. pp>H at LO (1-loop): details of the calculation (Mathematica Notebook) [attachment:HiggsGG-LO-mtfinite.nb HiggsGG-LO-mtfinite.nb]
     30   1. pp>H at NLO: details of the calculation (Mathematica Notebook) [attachment:HiggsGG-NLO.nb higgsGG-NLO.nb]
     31   1. pp>H at NLO: cross section evaluation for the LHC (Mathematica Notebook+PDF libraries to be compiled) [attachment:phenHiggs.tar.gz phenHiggs.tar.gz].
     32
     33A summary of the results can be found in [attachment:Higgs.pdf Higgs.pdf].
     34
     35=== MC Exercises ===
     36
     37====== Basics : MC101 ======
     38
     39A short introduction to the techniques of Monte Carlo integration. Exercises proposed during lecture are collected in this Mathematica Notebook: [attachment:mc101.nb mc101.nb].
     40
     41====== Basic exercises 1: Familiarize with Software.MadGraph ======
     42
     43   * Logon to the Software.MadGraph web site and register: http://madgraph.hep.uiuc.edu.
     44   * Register with a valid e-mail address
     45   * Feynman diagrams. Generate a few processes (with different QED + QCD couplings) trying to guess which diagrams appear:
     46      * uu~>tt~
     47      * gg>tt~
     48      * gg>tt~h (in SM and HEFT)
     49      * uu~>tt~bb~
     50   * Subprocess identification. List all subprocesses contributing to:
     51      * pp>l+vljj
     52      * pp>tt~bb~
     53      * pp>tt~jj
     54   * Look at the new physics models and check the particle and interactions content.
     55   * Advanced: Download the MG/ME package and play with the standalone version.
     56====== Basic exercises 2: Calculate cross sections and generate events ======
     57
     58   * Generate events for a few selected processes (work in groups, pick one each), for Tevatron and LHC energies. Does the cross section scale as you expect?
     59   * Compare cross sections with the processes of your neighbors. Do they differ as you would expect?
     60   * Look at the generated plots. Are the distributions as you would expect? Discuss with your neighbors.
     61
     62Example processes:
     63   * ttbar production: pp > tt~, QED=0
     64   * W production: pp > l+vl
     65   * Z/gamma* production: pp > e+e-
     66   * g g > (H > e+ ve mu- vm~) (in HEFT model)
     67   * p p > (W+>e+ ve) (W- > mu- vm~) (important background to previous process)
     68====== Advanced exercises 1: The full simulation chain and advanced features ======
     69
     70Try out the Analysis Tools:
     71   * a Fortran-based package: Software.MadAnalysis ([http://madgraph.phys.ucl.ac.be/cgi-bin/NewProcess/download.cgi Download it here])
     72   * a Root-based package: Software.ExRootAnalysis ([http://madgraph.hep.uiuc.edu/Downloads/ExRootAnalysis/ExRootAnalysis_V1.0.7.tar.gz Download it here])
     73   * a Mathematica-based package: [http://v1.jthaler.net/olympicswiki/doku.php?id=lhc_olympics:analysis_tools Chameleon]
     74
     75Study SM Higgs production at the LHC. Choose a channel and investigate signal and background, using either of the packages above:
     76   1. The 2 lepton + missing Et final state: %$ pp \to H\to W^+ W^- \to e^- \bar \nu_e \mu^+ \nu_\mu $%
     77   1.
     78      * Signal
     79         * Events: [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/hww-signal.lhe.gz Parton Level] || [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/hww-signal.lhco.gz Detector Level]
     80         * Plots: [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/hww-signal-lhe.pdf Parton Level] || [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/hww-signal-lhco.pdf Detector Level]
     81      * Background
     82         * Events: [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/hww-background.lhe.gz Parton Level] <span style="color: #000000;">|| </span>[http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/hww-background.lhco.gz Detector Level]
     83         * Plots: [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/hww-background-lhe.pdf Parton Level] <span style="color: #000000;">|| </span>[http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/hww-background-lhco.pdf Detector Level]
     84   1. Top associated production %$pp \to t\bar tH$% with %$H \to b \bar b$%
     85      * Signal + Background samples:
     86         * Events: [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/ttbb.lhe.gz Parton Level] || [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/ttbb.lhco.gz Detector Level]
     87         * Plots: [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/ttbb-lhe.pdf Parton Level] || [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/ttbb-lhco.pdf Detector Level]
     88====== Advanced exercises 2: Implementation of a new model in Software.MadGraph or [http://feynrules.phys.ucl.ac.be/ FeynRules] + Software.MadGraph ======
     89
     90Note that for these exercises you need to download the [http://madgraph.hep.uiuc.edu/Downloads/MG_ME_V4.4.56.tar.gz MadGraph/MadEvent package] (or [https://launchpad.net/madgraph5 MadGraph 5 package]) and work locally. You need a Fortran compiler (and for !MadGraph 5, Python v. 2.6 or 2.7).
     91=== For !FeynRules download and information, see the [http://feynrules.phys.ucl.ac.be/ FeynRules wiki] ===
     92   * Implement a (part of a) Standard Model extension into Software.MadGraph, specific for studying a given process. Generate events, study relevant distributions.
     93   * Determine most relevant Standard Model backgrounds with identical final states (&ldquo;non-reducible&rdquo;). If not too complicated, generate backgrounds with cuts determined from signal distributions.
     94   * Which other (&ldquo;reducible&rdquo;) backgrounds might be important?
     95   * Can the signal be seen at Tevatron? At the LHC?
     96=== Animations ===
     97   * [http://madgraph.hep.uiuc.edu/Event/ Interactive Flash version] Note you may want to zoom in!
     98   * [http://madgraph.hep.uiuc.edu/Event/fast_collisionx6.avi Fast movie (.avi) of collision]
     99   * [http://madgraph.hep.uiuc.edu/Event/collision.mov Guided movie (.mov) of collision]
     100   * [http://www.thedailyshow.com/watch/thu-april-30-2009/large-hadron-collider John Ellis on Daily Show]
     101
     102-- Main.FabioMaltoni - 2011-03-25
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