HepSim

Repository with Monte Carlo simulations for particle physics


Dataset: "gev35ep_pythia8_dis1q2"

Summary Comments
Name: gev35ep_pythia8_dis1q2
Collisions: e-p
CM Energy: 0.035 TeV
Entry ID: 284
Topic: SM
Generator: PYTHIA8
Calculation level: LO+PS+hadronisation
Process: DIS events at Q2>1 GeV2
Total events: 25000000
Number of files: 500
Cross section (σ): 3.221E+05 ± 749.6216 pb Estimated from file Nr 1
Luminosity (L): 77.6260 pb-1   (or)   0.0776 fb-1   (or)   7.763E-05 ab-1
Format: ProMC
Download URL: http://mc1.hep.anl.gov/web/hepsim/events/ep/35gev/pythia8_dis1q2/ Status: Available
Mirrors:
EVGEN size: 17.774 GB
  Reconstruction tag Tags:
Fast simulation:
Full simulation: rfull059 | Info
499 / 11.15 GB
07/17/2017
 rfull058 | Info
489 / 10.93 GB
07/17/2017
 
 
Fast/Full size: 22.09 GB
Record slimmed: No
Events weighted: No
Submission time: Mon Jun 26 8:48:12 CDT 2017
Updated on: Thu Jun 21 11:31:20 CDT 2018
Description:
This data sample is for testing only. It was generated using a modified version of Pythia 8.226 by Baptiste Cabouat (baptiste.cabouat[AT]gmail.com). Collision energy: E(p)=60 GeV and E(e-)=5 GeV. LHAPDF6:MSTW2008lo68cl.

Comment

The kinematic variables are calculated from truth-level electron before FSR. There is a dedicated double array with the truth-level kinemtics:
      eve->add_fdata(Q2)
      eve->add_fdata(X_bj)
      eve->add_fdata(Y_bj)
      eve->add_fdata(W)
For backward compatibility with older simulations (i.e. Lepto), Q2, W, X_bj and Y_bj are also encoded as
      eve->set_scale(W)
      eve->set_alpha_qed(Y_bj)
      eve->set_alpha_qcd(X_bj)
      eve->set_scale_pdf(Q2)
      eve->set_x1(x)
      eve->set_x2(y)

These energies are designed for the JLab EIC proposal. The samples were requested by J.Repond for ANL LDRD studies. Starting from the tag rfull054, truth-level event variables are included in the LCIO files as "parameters" with the keys:
     parameter EVGEN:eCM [float]
     parameter EVGEN:Process [string]
     parameter EVGEN:ID1 [int]
     parameter EVGEN:ID2 [int] 
     parameter EVGEN:ProcessID [int]
     parameter EVGEN:DIS:Q2 [float]      // Truth-level Q^2
     parameter EVGEN:DIS:W [float]       // Truth-level W
     parameter EVGEN:DIS:XBJ [float]     // Truth_level x_bjorken
     parameter EVGEN:DIS:YBJ [float]     // Truth_level y_bjorken
Please refer the HepSim manual

File metadata:
ProMC version: 4; Nr events: 50000; Varint E: 10000000; Varint L: 10000; Logfile: logfile.txt; Last modified: 2017-06-28 14:59:38; Settings: PYTHIA-8.226; ApplyParticleSlim=off;Random:setSeed = on;Random:seed = 0;Beams:frameType = 2;Next:numberShowEvent = 10;Beams:idA = 2212 ;Beams:idB = 11;Beams:eA = 60.;Beams:eB = 5.;HardQCD:all = off;PDF:lepton = off;TimeShower:QEDshowerByL = off;WeakBosonExchange:ff2ff(t:gmZ) = on;SpaceShower:dipoleRecoil = on;SpaceShower:dipoleRecoil = on;PhaseSpace:pTHatMin = 1.;PDF:pSet = LHAPDF6:MSTW2008lo68cl.LHgrid;PDF:extrapolate = on;ParticleDecays:limitTau0 = on;ParticleDecays:tau0Max = 10;EventsNumber=50000;

Validation:
Nr Analysis code Output image Output data
1  
pythia8_dis1q2.py

 
Run

JDAT file
Author: B.Cabouat/J.Repond/S.Chekanov

         
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