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Low-pT ttbar. Signal and signal+pileup
Here are samples of Delphes 3.08 events generated for the 14 TeV center-of-mass energy (pp collisions). The events are generated for 0, 50 and 140 pileup scenarios. All data are stored in the ROOT format using the standard Delphes output. Therefore, it is recommended to install Delphes and look at the example explaining how to read such ROOT files (see the directory “Examples” inside the Delphes package). The samples use “Snowmass” detector geometry. Jets were corrected using jet area correction. See this wiki for details.
In total, there are 96 files per sample (<mu>=0,50,140), with 1000 ttbar events in each. Thus the total number of events is 96000 signal events per sample.
How to download
Please read the Section How to download. You will need the “download.py” script posted on that page.
Signal ttbar
This is a ttbar (fully inclusive, all decays) without any cut on hard processes. HERWIG++ with sqrt(s)=14 TeV was used. The included processes at LO ME are:
g g -> t tbar q qbar -> t tbar
Look at the HERWIG++ log file used to generate the signal ttbar events. This is input settings
No pileup
Get the Delphes3 ROOT files from this download link. Here is an example for downloading 5 files:
python download.py 5 delphes36/ttbar/mu0 herwigpp_ttbar_delphes306
(set 5 to 96 to download all)
<mu>=50
Get the Delphes3 ROOT files from this download link. Here is an example for downloading 5 files:
python download.py 5 delphes36/ttbar/mu50 herwigpp_ttbar_delphes306_mu50
(set 5 to 96 to download all)
<mu>=140
Get the Delphes3 ROOT files from this download link. Here is an example for downloading 5 files:
python download.py 5 delphes36/ttbar/mu140 herwigpp_ttbar_delphes306_mu140
(set 5 to 96 to download all)
How to analyze using ROOT
If you need to find the effect of pileup on top reconstruction or a jet measurement, you need to run the analysis code over signal MC and then over the signal+pileup MC files. Read analyse_d3
How to analyze without ROOT
In some cases, you may not have ROOT installed to read these Delphes files. In this case, you can use ROOT files converted to the ProMC format which can be read without ROOT (using C++, Java, Python). Read how to read Delphes3 output without ROOT.
— Sergei Chekanov 2013/03/06 20:48
