Changes between Initial Version and Version 1 of CernSummerSchool17


Ignore:
Timestamp:
Jul 25, 2017, 9:05:58 AM (7 years ago)
Author:
Olivier Mattelaer
Comment:

--

Legend:

Unmodified
Added
Removed
Modified

  • CernSummerSchool17

    v1 v1  
     1
     2
     3== 2017 CERN Summer student workshop  ==
     4
     5=== Exercises ===
     6Discover the Higgs at the LHC:
     7   * Find the best prediction for Higgs production at the LHC [http://maltoni.web.cern.ch/maltoni/TeV4LHC/index.html here].
     8   * Find the Higgs branching ratios [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/h-br.pdf here].
     9
     10Choose a channel and investigate signal and background:
     11
     12   1. The 4 lepton final state: $pp \to H\to Z Z \to e^+e^- \mu^+ \mu^-$
     13      * Signal
     14         * Events:  [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/h4l-signal.lhe.gz Parton Level] [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/h4l-signal.lhco.gz Detector Level]
     15         * Plots: [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/h4l-signal-lhe.pdf Parton Level] [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/h4l-signal-lhco.pdf Detector Level]
     16      * Background
     17         * Events:  [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/h4l.lhe.gz Parton Level] [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/h4l.lhco.gz Detector Level]
     18         * Plots: [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/h4l-lhe.pdf Parton Level] [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/h4l-lhco.pdf Detector Level]
     19   1. The 2 lepton + missing Et final state: $pp \to H\to W^+ W^- \to e^- \bar \nu_e \mu^+ \nu_\mu $
     20      * Signal
     21         * Events:  [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/hww-signal.lhe.gz Parton Level] [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/hww-signal.lhco.gz Detector Level]
     22         * Plots: [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/hww-signal-lhe.pdf Parton Level] [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/hww-signal-lhco.pdf Detector Level]
     23      * Background
     24         * Events:  [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/hww-background.lhe.gz Parton Level] [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/h4l-background.lhco.gz Detector Level]
     25         * Plots: [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/h4l-background-lhe.pdf Parton Level] [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/h4l-background-lhco.pdf Detector Level]
     26   1. Top associated production $pp \to t\bar tH$ with $H \to b \bar b$
     27      *  Signal + Background samples:
     28         * Events:  [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/ttbb.lhe.gz Parton Level] [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/ttbb.lhco.gz Detector Level]
     29         * Plots: [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/ttbb-lhe.pdf Parton Level] [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/ttbb-lhco.pdf Detector Level]
     30
     31=== The Challenge ===
     32
     33Three "black boxes" are given, in the form of event files in the LHC Olympics format and a series of selected plots:
     34
     35   * Box A : [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/A.lhco.gz Events]  Plots:  [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/A-lhe.pdf Parton level]  [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/A.pdf Detector level]
     36   * Box B : [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/B.lhco.gz Events]   Plots:  [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/B-lhe.pdf Parton level]   [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/B.pdf Detector level]
     37   * Box C : [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/C.lhco.gz Events]  Plots:  [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/C-lhe.pdf Parton lelve]   [https://cp3.irmp.ucl.ac.be/projects/madgraph/attachment/wiki/CernSummerSchool/C.pdf Detector level]
     38
     39Black 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:
     40
     41   * Model 1 : Extra Z (zp) : What its mass? Does it have Standard Model couplings to fermions?
     42   * Model 2 : Heavy Scalar (h): What its mass?  Is it a SM Higgs?
     43   * Model 3 : Extra W (wp+ or wp-) : What its mass? Does it have Standard Model couplings to fermions?
     44 
     45Useful extra information:
     46   * In the plots $H_T=\sum ||p_T^{vis}|| + E_T^{miss}$.
     47   * 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-.
     48   * 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.   
     49   * 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.