Opened 7 years ago
Last modified 7 years ago
#1164 new How to
Is MinBias.pileup appliable to any process?
| Reported by: | drakemarquis | Owned by: | |
|---|---|---|---|
| Priority: | major | Milestone: | |
| Component: | Delphes code | Version: | Delphes 3 |
| Keywords: | pileup | Cc: |
Description
Hi Delphes developers,
I am trying to use Delphes to implement the detector responses for a 13 TeV LHC run. Pileup will play an important role in the detector simulation.
In your package, you provide MinBias.pileup. I am not sure if this file can be used for any process, or for some particular processes. Would you please let me know?
By the way, I actually ran Delphes with MinBias.pileup you provided, and I did not get what I want. My understanding is that to simulate pileup effects, I first use Pythia8 to do hadronization. In this step, I already have to implement pileup.
So for example, I ran 100 events and got a .lhef file. After running pythia8, I got a hepmc file with only 28 events, because of pileup (following the idea in main19.cc pythia8219/examples/). Then I ran Delphes with MinBias.pileup, and use a macro to extract information. However, the number of entries obtained by treeReader->GetEntries() is 100 again. So pileup is not properly implemented.
Is there anything I did not understand correctly?
Thanks in advance!
drakemarqius
Change History (2)
follow-up: 2 comment:1 by , 7 years ago
comment:2 by , 7 years ago
Hi mselvaggi,
Thanks! I noticed the file generatePileUp.cmnd which is supposed to generate pileup events. But which setting is for this purpose? There are many lines in the file, but I cannot recognized which line is for pileup.
Best wishes
drakemarquis
Replying to mselvaggi:
The MinBias file can used for pile up mixing at 14 TeV. Although it contains only 1000 events and it is for demonstration purposes only.
Those are hadronized minbias events.
If you need a larger one there are instructions on how to produce one with pythia8 and Delphes here:
https://cp3.irmp.ucl.ac.be/projects/delphes/wiki/WorkBook/Pythia8
The MinBias file can used for pile up mixing at 14 TeV. Although it contains only 1000 events and it is for demonstration purposes only.
Those are hadronized minbias events.
If you need a larger one there are instructions on how to produce one with pythia8 and Delphes here:
https://cp3.irmp.ucl.ac.be/projects/delphes/wiki/WorkBook/Pythia8