Changes between Initial Version and Version 1 of CernSummerSchool12


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Timestamp:
03/20/12 16:16:50 (8 years ago)
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trac
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  • CernSummerSchool12

    v1 v1  
     1
     2
     32007 CERN Summer student workshop
     4
     5Exercises
     6
     7Discover the Higgs at the LHC:
     8
     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].
     11
     12Choose a channel and investigate signal and background:
     13
     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$%
     29        Signal + Background samples:
     30            Events: [attachment:ttbb.lhe.gz Parton Level] [attachment:ttbb.lhco.gz Detector Level]
     31            Plots: [attachment:ttbb-lhe.pdf Parton Level] [attachment:ttbb-lhco.pdf Detector Level]
     32
     33The Challenge
     34
     35Three "black boxes" are given, in the form of event files in the LHC Olympics format and a series of selected plots:
     36
     37    Box A : [attachment:A.lhco.gz Events] Plots: [attachment:A-lhe.pdf Parton level] [attachment:A.pdf Detector level]
     38    Box B : [attachment:B.lhco.gz Events] Plots: [attachment:B-lhe.pdf Parton level] [attachment:B.pdf Detector level]
     39    Box C : [attachment:C.lhco.gz Events] Plots: [attachment:C-lhe.pdf Parton lelve] [attachment:C.pdf Detector level]
     40
     41Black boxes contain only signal events. The students are asked to pair up the boxes above with the following models and also answer to the questions:
     42
     43    Model 1 : Extra Z (zp) : What its mass? Does it have Standard Model couplings to fermions?
     44    Model 2 : Heavy Scalar (h): What its mass? Is it a SM Higgs?
     45    Model 3 : Extra W (wp+ or wp-) : What its mass? Does it have Standard Model couplings to fermions?
     46
     47Useful extra information:
     48
     49    In the plots %$H_T=\sum ||p_T^{vis}|| + E_T^{miss}$%.
     50    A SM-like Z' would decay (more or less democratically) into: jet jet (uu~,cc~,dd~,ss~,bb~), t tbar (tt~), lept+lept- (e+e-,mu+mu-,ta+ta-), neutrino anti-neutrino (ve ve~,vm vm~,vt vt~). It could also have couplings to SM W and Z, and in that case would decay in to ZZ and W+W-.
     51    An Higgs couple to particles with a strength which is proportional to the particle masses. A SM-like heavy H would decay in to t tbar (tt~), W+W-, ZZ.
     52    A SM-like W'+ would decay into: jet jet (ud~,cs~), t b (tb~), lept neutrino (e+ ve , mu+ vm, ta+ vt). It could also have couplings to SM W and Z, and in that case would decay in to ZW.
     53
     54-- Main.FabioMaltoni - 08 Aug 2007
     55
     56
     572012 CERN Summer student workshop
     58
     59Exercises
     60
     61Discover the Higgs at the LHC:
     62
     63Find the best prediction for Higgs production at the LHC [http://maltoni.web.cern.ch/maltoni/TeV4LHC/index.html here]. Find the Higgs branching ratios [attachment:h-br.pdf here].
     64
     65Choose a channel and investigate signal and background:
     66
     67The 4 lepton final state: %$pp \to H\to Z Z \to e^+e^- \mu^+ \mu^-$% Signal
     68     
     69          Events:: [attachment:h4l-signal.lhe.gz Parton Level] [attachment:h4l-signal.lhco.gz Detector Level]
     70          Plots:: [attachment:h4l-signal-lhe.pdf Parton Level] [attachment:h4l-signal-lhco.pdf Detector Level] Background
     71          Events:: [attachment:h4l.lhe.gz Parton Level] [attachment:h4l.lhco.gz Detector Level]
     72          Plots: [attachment:h4l-lhe.pdf Parton Level] [attachment:h4l-lhco.pdf Detector Level] The 2 lepton + missing Et final state:: %$pp \to H\to W^+ W^- \to e^- \bar \nu_e \mu^+ \nu_\mu $% Signal
     73          Events:: [attachment:hww-signal.lhe.gz Parton Level] [attachment:hww-signal.lhco.gz Detector Level]
     74          Plots:: [attachment:hww-signal-lhe.pdf Parton Level] [attachment:hww-signal-lhco.pdf Detector Level] Background
     75          Events:: [attachment:hww-background.lhe.gz Parton Level] [attachment:h4l-background.lhco.gz Detector Level]
     76          Plots:: [attachment:h4l-background-lhe.pdf Parton Level] [attachment:h4l-background-lhco.pdf Detector Level] Top associated production %$pp \to t\bar tH$% with %$H \to b \bar b$% Signal + Background samples:
     77          Events:: [attachment:ttbb.lhe.gz Parton Level] [attachment:ttbb.lhco.gz Detector Level]
     78          Plots:: [attachment:ttbb-lhe.pdf Parton Level] [attachment:ttbb-lhco.pdf Detector Level]
     79
     80The Challenge
     81
     82Three "black boxes" are given, in the form of event files in the LHC Olympics format and a series of selected plots:
     83
     84Box A : [attachment:A.lhco.gz Events] Plots: [attachment:A-lhe.pdf Parton level] [attachment:A.pdf Detector level] Box B : [attachment:B.lhco.gz Events] Plots: [attachment:B-lhe.pdf Parton level] [attachment:B.pdf Detector level] Box C : [attachment:C.lhco.gz Events] Plots: [attachment:C-lhe.pdf Parton lelve] [attachment:C.pdf Detector level]
     85
     86Black boxes contain only signal events. The students are asked to pair up the boxes above with the following models and also answer to the questions:
     87
     88Model 1 : Extra Z (zp) : What its mass? Does it have Standard Model couplings to fermions? Model 2 : Heavy Scalar (h): What its mass? Is it a SM Higgs? Model 3 : Extra W (wp+ or wp-) : What its mass? Does it have Standard Model couplings to fermions?
     89
     90Useful extra information:
     91
     92In the plots %$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.
     93
     94-- Main.FabioMaltoni - 08 Aug 2007 -- Main.FabioMaltoni - 2011-07-12