Changes between Version 2 and Version 3 of CernSummerSchool12


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Timestamp:
04/19/12 08:54:00 (7 years ago)
Author:
md987
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  • CernSummerSchool12

    v2 v3  
    332007 CERN Summer student workshop
    44
    5 Exercises
     5=== Exercises ===
    66
    77Discover the Higgs at the LHC:
    88
    9     Find the best prediction for Higgs production at the LHC [http://maltoni.web.cern.ch/maltoni/TeV4LHC/index.html here].
    10     Find the Higgs branching ratios [attachment:h-br.pdf here].
     9    * Find the best prediction for Higgs production at the LHC [http://maltoni.web.cern.ch/maltoni/TeV4LHC/index.html here].
     10    * Find the Higgs branching ratios [attachment:h-br.pdf here].
    1111
    1212Choose a channel and investigate signal and background:
    1313
    14     The 4 lepton final state: $pp \to H\to Z Z \to e^+e^- \mu^+ \mu^-$
    15         Signal
    16             Events: [attachment:h4l-signal.lhe.gz Parton Level] [attachment:h4l-signal.lhco.gz Detector Level]
    17             Plots: [attachment:h4l-signal-lhe.pdf Parton Level] [attachment:h4l-signal-lhco.pdf Detector Level]
    18         Background
    19             Events: [attachment:h4l.lhe.gz Parton Level] [attachment:h4l.lhco.gz Detector Level]
    20             Plots: [attachment:h4l-lhe.pdf Parton Level] [attachment:h4l-lhco.pdf Detector Level]
    21     The 2 lepton + missing Et final state: $pp \to H\to W^+ W^- \to e^- \bar \nu_e \mu^+ \nu_\mu $
    22         Signal
    23             Events: [attachment:hww-signal.lhe.gz Parton Level] [attachment:hww-signal.lhco.gz Detector Level]
    24             Plots: [attachment:hww-signal-lhe.pdf Parton Level] [attachment:hww-signal-lhco.pdf Detector Level]
    25         Background
    26             Events: [attachment:hww-background.lhe.gz Parton Level] [attachment:h4l-background.lhco.gz Detector Level]
    27             Plots: [attachment:h4l-background-lhe.pdf Parton Level] [attachment:h4l-background-lhco.pdf Detector Level]
    28     Top associated production $pp \to t\bar tH$ with $H \to b \bar b$
    29         Signal + Background samples:
    30             Events: [attachment:ttbb.lhe.gz Parton Level] [attachment:ttbb.lhco.gz Detector Level]
    31             Plots: [attachment:ttbb-lhe.pdf Parton Level] [attachment:ttbb-lhco.pdf Detector Level]
     14    1. The 4 lepton final state: $pp \to H\to Z Z \to e^+e^- \mu^+ \mu^-$
     15        * Signal Events: [attachment:h4l-signal.lhe.gz Parton Level] [attachment:h4l-signal.lhco.gz Detector Level] Plots: [attachment:h4l-signal-lhe.pdf Parton Level] [attachment:h4l-signal-lhco.pdf Detector Level]
     16        * Background            Events: [attachment:h4l.lhe.gz Parton Level] [attachment:h4l.lhco.gz Detector Level]            Plots: [attachment:h4l-lhe.pdf Parton Level] [attachment:h4l-lhco.pdf Detector Level]
     17    1. The 2 lepton + missing Et final state: $pp \to H\to W^+ W^- \to e^- \bar \nu_e \mu^+ \nu_\mu $
     18        * Signal            Events: [attachment:hww-signal.lhe.gz Parton Level] [attachment:hww-signal.lhco.gz Detector Level]            Plots: [attachment:hww-signal-lhe.pdf Parton Level] [attachment:hww-signal-lhco.pdf Detector Level]
     19        * Background            Events: [attachment:hww-background.lhe.gz Parton Level] [attachment:h4l-background.lhco.gz Detector Level]            Plots: [attachment:h4l-background-lhe.pdf Parton Level] [attachment:h4l-background-lhco.pdf Detector Level]
     20    1. Top associated production $pp \to t\bar tH$ with $H \to b \bar b$
     21        * Signal + Background samples:            Events: [attachment:ttbb.lhe.gz Parton Level] [attachment:ttbb.lhco.gz Detector Level]            Plots: [attachment:ttbb-lhe.pdf Parton Level] [attachment:ttbb-lhco.pdf Detector Level]
    3222
    33 The Challenge
     23=== The Challenge ===
    3424
    3525Three "black boxes" are given, in the form of event files in the LHC Olympics format and a series of selected plots:
    3626
    37     Box A : [attachment:A.lhco.gz Events] Plots: [attachment:A-lhe.pdf Parton level] [attachment:A.pdf Detector level]
    38     Box B : [attachment:B.lhco.gz Events] Plots: [attachment:B-lhe.pdf Parton level] [attachment:B.pdf Detector level]
    39     Box C : [attachment:C.lhco.gz Events] Plots: [attachment:C-lhe.pdf Parton lelve] [attachment:C.pdf Detector level]
     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]
    4030
    4131Black 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:
    4232
    43     Model 1 : Extra Z (zp) : What its mass? Does it have Standard Model couplings to fermions?
    44     Model 2 : Heavy Scalar (h): What its mass? Is it a SM Higgs?
    45     Model 3 : Extra W (wp+ or wp-) : What its mass? Does it have Standard Model couplings to fermions?
     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?
    4636
    4737Useful extra information:
    4838
    49     In the plots $H_T=\sum ||p_T^{vis}|| + E_T^{miss}$.
    50     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-.
    51     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.
    52     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.
     39    * In the plots $H_T=\sum ||p_T^{vis}|| + E_T^{miss}$.
     40    * 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-.
     41    * 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.
     42    * 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.
    5343
    5444-- Main.FabioMaltoni - 08 Aug 2007