hepsim:usage_view
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+ | {{indexmenu_n> | ||
+ | |||
+ | [[: | ||
+ | |||
+ | ====== Detector visualization ====== | ||
+ | |||
+ | Much of this topic has been discussed in the Section [[hepsim: | ||
+ | |||
+ | |||
+ | |||
+ | ====== Event 1 ====== | ||
+ | |||
+ | Here is one example of event visualization: | ||
+ | Such heavy particles can only be produced at the FCC-hh | ||
+ | experiment with the center-of-mass of energy of 100 TeV for colliding protons. | ||
+ | The transverse momenta of these bosons from the Z' decay is about 20 TeV. | ||
+ | Here are a few images illustrating a single event Z'(40 TeV) → W+W- → hadrons: | ||
+ | |||
+ | {{: | ||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | {{: | ||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | |||
+ | This simulation was created using a FCC-like detector (SiFCC) developed at ANL/ | ||
+ | This detector is described [[http:// | ||
+ | for this simulation | ||
+ | |||
+ | You can see two high-pT jets (~20 TeV) from each W decay, and many back-splash particles. | ||
+ | This event has many secondary interaction in the detector material. These images show Geant4 truth-level particles (straight lines) created by secondary interactions | ||
+ | due to " | ||
+ | |||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | A real pp (100 TeV) → Z' | ||
+ | the presence of the protons in the initial state and pileup events (up to 1000 MinBias events). | ||
+ | |||
+ | |||
+ | |||
+ | This simulation is very challenging since | ||
+ | the [[http:// | ||
+ | takes 4 hours (8 CPU cores, Xeon(R) CPU E5-2450 2.50GHz) with 16 GB memory on the ANL/HEP cluster. | ||
+ | The simulation of a typical pp-collision event at the LHC takes 15 min. | ||
+ | |||
+ | The event shown above has: | ||
+ | |||
+ | * 10,000 hits in ECAL | ||
+ | * 46,000 hits in HCAL | ||
+ | * 12,000 hits in the outer tracker | ||
+ | * 1,000 hits in the inner tracker | ||
+ | |||
+ | |||
+ | ====== Event 2 ====== | ||
+ | |||
+ | This is another Z'(40 TeV) → W+ W- example, where W+ decays to hadrons, and W- decays to electron and neutrino. | ||
+ | The neutrino is not detected, but the electron can be well reconstructed as shown here: | ||
+ | |||
+ | |||
+ | {{: | ||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | This event has 25,000 hits in the HCAL+ECAL, and about 6,000 in the tracker. | ||
+ | |||
+ | ====== How to make such images ====== | ||
+ | |||
+ | |||
+ | Use [[hepsim: | ||
+ | |||
+ | <code bash> | ||
+ | wget http:// | ||
+ | tar -zvxf jas4pp.tgz | ||
+ | cd jas4pp | ||
+ | source ./setup.sh # takes 5 sec for first-time optimization | ||
+ | wget http:// | ||
+ | jaspp gev250_pythia6_zpole_bbar_0001_pandora.slcio | ||
+ | </ | ||
+ | Then press the small " | ||
+ | You will need a computer with at least 8 GB RAM. This example is shown for e+e- events at 250 GeV. Similarly, use other files with the tag " | ||
+ | |||
+ | You can download all reconstructed files as | ||
+ | |||
+ | < | ||
+ | hs-get tev40mumu_pythia6_zprime_ww%rfull006 | ||
+ | </ | ||
+ | |||
+ | |||
+ | ====== Read more ====== | ||
+ | |||
+ | Physics studies used this detector were discussed in the talk [[https:// | ||
+ | |||
+ | |||
+ | |||
+ | --- // | ||