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====== Analysis of fast simulations ======

====== Downloading ROOT files  ======
Files after fast detector simulations are created using [[https://cp3.irmp.ucl.ac.be/projects/delphes | Delphes]] program. Assuming that you have installed either** hs-tools** or **Jas4pp** programs, you can use the "hs-get"  command to download files. You can find all samples with
fast simulations using the [[http://atlaswww.hep.anl.gov/hepsim/list.php?find=rfast|rfast tag]]. If you need to find all ROOT files for a given tag, say rfast100, use this command:

<code bash>
hs-find tev14_mg5%rfast100
</code>
which searches for all samples with the dataset name "tev14_mg5" (Madgraph5, 14 TeV samples). Then download a selected sample as:

<code bash>
hs-get tev14_mg5_nlo_httbar%rfast100
</code>

The description of the detector tags is given in [[hepsim:usage_detectors|Detector description]].

====== Analyzing ROOT files  ======

Read the [[https://cp3.irmp.ucl.ac.be/projects/delphes| Delphes manual]] explaining how to analyze ROOT files from HepSim. 

====== Creating Delphes files  ======

Read the section [[hepsim:dev_fast|Creating fast simulations]]