Changes between Version 1 and Version 2 of WorkBook/Tutorials/Mc4Bsm

Timestamp:

Jul 20, 2016, 4:34:45 AM (8 years ago)

Author:

Michele Selvaggi

Comment:

--

WorkBook/Tutorials/Mc4Bsm

@@ -2 +2 @@
 
 = Delphes Tutorial - MC4BSM July 2016 =
+
+== Pre-requisites ==
+
+To successfully build Delphes the following prerequisite packages should be installed:
+
+- gcc/tcl:
+
+For linux users gcc/tcl should be already installed. For Mac users you should install XCode.
+
+- ROOT:
+
+can be downloaded from https://root.cern.ch/downloading-root
+Go on latest release, and download a version under "Binary distributions".
+
+Once it is installed, type:
+
+{{{
+source [path_to_installation]/root/bin/thisroot.sh
+}}}
+
+Then simply type in a terminal:
+
+{{{
+echo $ROOTSYS
+}}}
+
+If a path is shown then root is properly installed.
+
+=== Part I - Getting Started ===
+
+0) Create a tutorial directory:
+
+{{{
+mkdir DelphesTutorial
+}}}
+
+1) Get Delphes:
+{{{
+git clone https://github.com/delphes/delphes.git
+cd delphes
+}}}
+or, if you don't have "git" installed, simply type:
+{{{
+wget http://cp3.irmp.ucl.ac.be/downloads/Delphes-3.3.2.tar.gz
+tar -zxf Delphes-3.3.2.tar.gz
+mv Delphes-3.3.2 delphes
+cd delphes
+}}}
+2) Install it:
+{{{
+./configure
+make -j 4
+}}}
+3) Download Z' to WW events in stdhep format
+{{{
+gunzip ../MG5_aMC_v2_4_0/pp_h_eemm_res/Events/run_01/tag_1_pythia_events.hep.gz
+gunzip ../MG5_aMC_v2_4_0/pp_h_eemm_res/Events/run_02/tag_1_pythia_events.hep.gz
+}}}
+{{{
+mkdir -p input
+mv ../MG5_aMC_v2_4_0/pp_h_eemm_res/Events/run_01/tag_1_pythia_events.hep input/pp_h_eemm_m125.hep
+mv ../MG5_aMC_v2_4_0/pp_h_eemm_res/Events/run_02/tag_1_pythia_events.hep input/pp_h_eemm_m750.hep
+}}}
+
+4) Finally, let's run Delphes. If the compilation went right, you should have three executables:
+
+- DelphesLHEF  -> should not be used
+- DelphesHepMC -> to be used on HepMC input format (*.hepmc)
+- DelphesSTDHEP -> to be used on STDHEP input format (*.hep)
+
+Type for instructions (note that output file comes before input file):
+{{{
+./DelphesSTDHEP
+}}}
+To run on our your input file, type:
+{{{
+./DelphesSTDHEP cards/delphes_card_CMS.tcl delphes_output_m125.root input/pp_h_eemm_m125.hep
+}}}
+5) Open freshly produced Delphes output with ROOT, and explore it.
+{{{
+root -l delphes_output_m125.root
+TBrowser t;
+}}}
+In the browser, double click on the "delphes_output_m125.root", and then on the "Delphes" tree. Play around by double clicking on the various branches/observables.
+
+You can then play plot important observable with a simple selection with the following syntax:
+{{{
+Delphes->Draw("Muon.PT", "Muon.PT > 20");
+Delphes->Draw("Electron.PT", "Electron.PT > 20");
+}}}
+- Note 1: Delphes - tree name, it can be learnt e.g. from TBrowser
+- Note 2: !Muon/Electron - branch name; PT - variable (leaf) of this branch
+{{{
+Delphes->Draw("Muon.Eta", "Muon.PT > 20");
+Delphes->Draw("Electron.Eta", "Electron.PT > 20");
+Delphes->Draw("Jet_size","Electron_size > 1 && Muon_size > 1");
+}}}
+Objects are already ordered in PT, you can then plot leading ele/mu in this way:
+{{{
+Delphes->Draw("Muon[0].PT", "Muon.PT > 20");
+Delphes->Draw("Electron[0].PT", "Electron.PT > 20");
+}}}
+For more information on ROOT trees:
+
+http://cp3.irmp.ucl.ac.be/downloads/RootTreeDescription.html
+