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Comparison of Mokka and LCDG4 Performance Using Particle Samples

This report presents a detailed comparison between Mokka and LCDG4 using single particle data samples consisting of 10 GeV muons, 50 GeV pions, and 50 electrons. The analysis highlights energy deposition patterns in the electromagnetic (ECal) and hadronic (HCal) calorimeters, noting discrepancies in energy readings and kinematics. Observations reveal that while both simulations exhibit inconsistencies with Gismo-based sampling, they align better with each other. The study calls for further investigation into identified issues, such as false peaks in absorber energies and entails repetitive comparisons under controlled conditions.

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Comparison of Mokka and LCDG4 Performance Using Particle Samples

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  1. Mokka vs. LCDG4 Comparison Guilherme, Jeremy Sep.17, 2003

  2. Data Samples Single particle samples, 1000 evts each • 10 GeV muons • 50 Gev pions (flat in phi) • 50 electrons (theta = 60°, phi = 90°) Warning: different kinematics!!

  3. Energy per ECal layer - pions

  4. Energy per HCal layer - pions

  5. Live energy per cell in ECal

  6. Live energies per cell in Hcal

  7. LCDG4: Eabs per cell in Ecal

  8. LCDG4: Eabs in Ecal (log scale)

  9. LCDG4: Eabs per cell in Hcal

  10. Total live energy - pions

  11. Total corrected energy - pions

  12. Total live energy – electrons

  13. Total corrected energy – electrons

  14. Conclusions • Likely there are still some bugs in LCDG4 • Despite clear disagreements in EM showers between Mokka and LCDG4, they show better agreement among them than with Gismo • None of them are not properly corrected using Gismo-based sampling fractions • More investigations needed

  15. Next steps • Repeat comparisons using projective LCDG4 • Fair comparison: same versions of libraries, same cuts, same kinematics • Find/fix problem with fake peaks in absorber energies

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