Opened 12 years ago
Closed 12 years ago
#44 closed How to (fixed)
PDF Informations in Delphes
Reported by: | muanza | Owned by: | |
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Priority: | major | Milestone: | |
Component: | Delphes code | Version: | all recent versions (> 1.8) |
Keywords: | Cc: | muanza@… |
Description
Hello,
I produced MC samples with Herwig++ and Pythia8 and ran Delphes on their HepMC outputs.
I'd like to apply PDF reweighting to those root-tuples, so I need the usual x1,x2,flav1,flav2,Q² variables. The last one seems to be in the GEN tree whereas for the x's and flav's of the colliding partons I couldn't figure an obvious robust way to identify them for all processes.
Is there a recipe for this?
Attachments (2)
Change History (6)
comment:1 by , 12 years ago
comment:2 by , 12 years ago
Dear all,
I slightly modified Delphes_V_2.0.2 in order to add the PDF variables cited above into the GEN tree, only for the case of an HepMC input file. I retrieved these variables from the HepMC::PdfInfo class.
Please find hereby attached the 2 modified files.
Best regards, Steve
by , 12 years ago
Attachment: | BlockClasses.h added |
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Delphes_V_2.0.2/Utilities/ExRootAnalysis/interface/BlockClasses.h
comment:3 by , 12 years ago
Dear all,
As far as I'm concerned, this ticket can be closed.
Thanks
Regards, Steve
comment:4 by , 12 years ago
Resolution: | → fixed |
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Status: | new → closed |
Hi Steve,
Is it possible to extract the x1,x2,flav1,flav2,Q² variables using information from a STDHEP common block?
Or should we calculate them from the kinematic parameters of incoming protons and partons?
Here is a basic description of the STDHEP contents:
http://cmssdt.cern.ch/SDT/lxr/source/SimDataFormats/GeneratorProducts/data/stdhep.inc
Regards,
Pavel