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2009 CERN Summer student workshop
Animations
- Interactive Flash version Note you may want to zoom in!
- Fast movie (.avi) of collision
- Guided movie (.mov) of collision
Exercises
Discover the Higgs at the LHC:
- Find the best prediction for Higgs production at the LHC here.
- Find the Higgs branching ratios here.
Choose a channel and investigate signal and background:
- The 4 lepton final state: $pp \to H\to Z Z \to e+e- \mu+ \mu-$
- Signal Plots: Parton Level Detector Level
- Background Plots: Parton Level Detector Level
- Top associated production $pp \to t\bar tH$ with $H \to b \bar b$
- Signal + Background Plots: Parton Level Detector Level
The Challenge
Three "black boxes" are given, in the form of event files in the LHC Olympics format and a series of selected plots:
- Box A : Events Plots: Parton level Detector level
- Box B : Events Plots: Parton level Detector level
- Box C : Events Plots: Parton level Detector level
Black 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:
- Model 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?
Useful extra information:
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.
- plots.pdf: testplots
- CernSummerSchool09.pdf: 2009 presentation
- Worksheets09.pdf: Worksheets
-- Main.OlivierMattelaer - 03 Aug 2009
Attachments (21)
- latex8177db625a2b4f40e084f2a05166ac6d.png (396 bytes ) - added by 12 years ago.
- latexa63bee2ecfb5e797ef9059b811648913.png (712 bytes ) - added by 12 years ago.
- CernSummerSchool09.pdf (3.2 MB ) - added by 12 years ago.
- latexf88c3efeb8e0fedae27af32e00abfee2.png (336 bytes ) - added by 12 years ago.
- Worksheets09.pdf (56.5 KB ) - added by 12 years ago.
- latexac6f34cf441ab8cd941caf458a3d4fce.png (779 bytes ) - added by 12 years ago.
- h-br.pdf (36.2 KB ) - added by 12 years ago.
- h4l-sig2.pdf (626.7 KB ) - added by 12 years ago.
- h4l-lhco.pdf (196.7 KB ) - added by 12 years ago.
- ttbb-lhe.pdf (109.2 KB ) - added by 12 years ago.
- A.lhco.gz (6.0 MB ) - added by 12 years ago.
- B.lhco.gz (3.7 MB ) - added by 12 years ago.
- C.lhco.gz (3.9 MB ) - added by 12 years ago.
- plots.pdf (122.2 KB ) - added by 12 years ago.
- ttbb-lhco.pdf (363.9 KB ) - added by 12 years ago.
- B.pdf (98.2 KB ) - added by 12 years ago.
- A-lhe.pdf (110.9 KB ) - added by 12 years ago.
- A.pdf (272.1 KB ) - added by 12 years ago.
- B-lhe.pdf (128.1 KB ) - added by 12 years ago.
- C-lhe.pdf (92.8 KB ) - added by 12 years ago.
- C.pdf (157.0 KB ) - added by 12 years ago.
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