Dataset: "tev13pp_qcd_pythia8_proio_tests"

Summary Comments
Name: tev13pp_qcd_pythia8_proio_tests
DOI identifier: 10.34664/1575732 ( link)
Collisions: pp
CM Energy: 13 TeV
Entry ID: 326
Topic: SM
Generator: PYTHIA8
Calculation level: LO+PS+hadronisation
Process: QCD dijets for tests of ProIO
Total events: 100000
Number of files: 5
Cross section (σ): 2.641E+07 ± 9.848E+04pb Warning: Not accurate for weighted events
Luminosity (L): 0.0038 pb-1   (or)   3.786E-06 fb-1   (or)   3.786E-09 ab-1 Warning: Not accurate for weighted events
Format: ProIO
Truth record URL: Status: Available
EVGEN size: 0.108 GB
  Reconstruction tag Tags:
Fast simulation:
Full simulation:
Fast/Full size: 0.00 GB
Record slimmed: Yes
Events weighted: Yes
Submission time: Mon Aug 20 20:20:00 UTC 2018
Updated on: Mon Aug 27 21:00:15 UTC 2018
This entry is used for testing different ProIO models for events with large number of particles. Do not use it for physics. This sample corresponds to one file from tev13pp_qcd_pythia8_weighted. The files contain Inclusive dijet events for pT>50 GeV. (PhaseSpace:pTHatMin=50 GeV). 20,000 events per file. PDF: LHAPDF6:NNPDF23_lo_as_0130_qed. The sample was created using the Pythia8 tune Tune:pp = 14, similar to ATLAS.

This sample is created for testing ProIO data format

How to use

This is weighted events to obtain good statistics up to very large pT. This feature is set via PhaseSpace:bias2Selection and PhaseSpace:bias2SelectionPow = 5.0. Use event weights to obtain correct pT distribution. Particle records are slimmed (all stable with pT>0.3 GeV) and (PID=5 || PID=6) or PID>22 && PID<38) or PID>10 && PID<17).

File formats

The 4 posted files use 4 different event models for the ProIO package. Look at their size in tev13pp_qcd_pythia8_proio_tests. The file format is ProIO with different event models for event storage. The file sizes are quite different depending on event model.
  • tev13_pythia8_qcdjets_wgt.promc - original ProMC file that uses the original ProMC-type of model with varints for 4-moment and vertex. The varint conversion unit are included in the header of the file.
  • tev13_pythia8_qcdjets_pt50_promc.proio - uses the original ProMC with varints for 4-moment and vertex. The vaint unit are included in the header of the file.
  • tev13_pythia8_qcdjets_pt50_proeic.proio - uses the original ProMC with floats for 4-momentum and vertex. Varints are used only for integer values (status, pdg etc).
  • tev13_pythia8_qcdjets_pt50_mc.proio - uses the original ProIO model for truth level with floats for 4-momentum and vertex
  • tev13_pythia8_qcdjets_pt50_mcpacked.proio - uses the original ProIO model "MC" for truth level as above, but 4-momentum and vertex use int64 varints, exactly as for ProMC data model.
These files include event-model files, as well as varint transformations when applicable, so you can see and reproduce these results. You can also download ROOT file converted from tev13_pythia8_qcdjets_wgt.promc. The name of this file is tev13_pythia8_qcdjets_wgt.root (use wget to copy it). It uses Double32 for 4-momenta and vertex, but does not include MC parameters or logfile. The ROOT file has a size of 196 MB, which is a about 80% larger than the varint-type event records.

File metadata:
ProMC version: ; Nr events: 20000; Varint E: ; Varint L: ; Logfile: logfile.txt; Last modified: Wed Aug 22 11:51:39 2018; Settings: PYTHIA-8.235; ApplyParticleSlim=on;EventsNumber=20000;Random:setSeed = on;Random:seed = 0;Beams:idA = 2212;Beams:idB = 2212;Beams:eCM = 13000.;HardQCD:all = on;PDF:pSet = LHAPDF6:NNPDF23_lo_as_0130_qed;Tune:ee = 7 ;Tune:pp = 14;SpaceShower:rapidityOrder = on;SigmaProcess:alphaSvalue = 0.140;SpaceShower:pT0Ref = 1.56;SpaceShower:pTmaxFudge = 0.91;SpaceShower:pTdampFudge = 1.05;SpaceShower:alphaSvalue = 0.127;TimeShower:alphaSvalue = 0.127;BeamRemnants:primordialKThard = 1.88;MultipartonInteractions:pT0Ref = 2.09;MultipartonInteractions:alphaSvalue = 0.126;PhaseSpace:mHatMin = 50.;PhaseSpace:mHatMax = 20000;PhaseSpace:pTHatMin = 50;PhaseSpace:pTHatMax = 20000;ParticleDecays:limitTau0 = on;ParticleDecays:tau0Max = 10;PhaseSpace:bias2Selection = on;PhaseSpace:bias2SelectionPow = 5.0;

Nr Analysis code Output image Output data
Author: S.Chekanov/ D.Blyth