Warning, /analysis/hbcup/README.md is written in an unsupported language. File is not indexed.
0001 # Rough steps to generate simulations for a UPC analysis:
0002
0003 1. Generate starlight MC events, for all channels and decay modes that can contribute to the real data.
0004 Other event generators could be used.
0005
0006 2. Convert the starlight files to HEPMC so that they can be read by the sPHENIX simulation code.
0007
0008 StarLight_To_HepMc slight.out hepmc.dat
0009
0010 You should of course replace hepmc.dat with a sensible name like starlight_cohjpsi_mumu.dat.
0011
0012 The converter source code is in the sphenix repository at coresoftware/generators/sphstarlight/.
0013 (All of our code is in the sphenix repository so this will be assumed from now on).
0014
0015 3. Once you have the HEPMC files, you can now run the sphenix simulation on those events, as
0016 explained in the wiki and in the code documentation at
0017
0018 https://github.com/sPHENIX-Collaboration/macros
0019
0020 The output should be a G4sPHENIX.root file, which is the simulated DST. It contains similar data
0021 to what you have from a DST from the real data. Since this is a simulation, if you decide to,
0022 you can also include all the "truth" information from the monte carlo event generator and geant output.
0023
0024 4. Analyze the DSTs just as you would a real DST. The analysis code is at
0025
0026 analysis/hbcup/
0027
0028 The macro that drives the code is in macro/Fun4All_AnaUPC.C, and the source code for doing the analysis
0029 is src/AnaUPC.*
0030
0031 5. Derive background from hadronic collisions using Hijing. One can get a low statistics estimate from MDC2 files,
0032 but adequate statistics can only be done from a custom production... The analysis macro to use for this is
0033 Fun4All_hijbkg.C.
0034
