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Mokka vs. LCDG4 Comparison

Mokka vs. LCDG4 Comparison. Guilherme Lima DHCal Meeting - Sep. 24, 2003. Why comparing Mokka and LCDG4?. Previous LCD studies based on Gismo Geant4-based LCD simulations are rather new, they need to be certified (then Gismo should be dropped)

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Mokka vs. LCDG4 Comparison

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  1. Mokka vs. LCDG4 Comparison Guilherme Lima DHCal Meeting - Sep. 24, 2003

  2. Why comparing Mokka and LCDG4? • Previous LCD studies based on Gismo • Geant4-based LCD simulations are rather new, they need to be certified (then Gismo should be dropped) • (LCD)Mokka and LCDG4 were developed independently. Both are based on Geant4, so they should provide compatible results • How about hadron,EM physics? Should we use Geant3 for comparisons?

  3. Comparing apples to apples… • Geant version (4.5.1 in nicadd, 4.5.2 not installed) • Geometry (SDJan03, projective) • Physics list: identical data files (almost) • Range cuts (0.7mm) • No energy thresholds • Geant4 external data files not used (don’t matter) • Text output implemented into projective LCDG4 • Angular distributions (input from file, bad random number generators…): theta = 90deg , flat in phi • Materials (some differences, maybe ok for cals?) • No bugs!!!

  4. EdepLayer in Ecal: 50GeV e+

  5. EdepLayer in Hcal – 50 GeV e+

  6. EdepCell in Hcal: 50 GeV mu+

  7. EdepLayer in Ecal: 50 GeV mu+

  8. EdepLayer in Hcal: 50 GeV mu+

  9. Next steps • Still some checks needed for reliable comparisons: • Better random number generator for kinematics • Energy = 50 GeV, not momentum • Materials • Input from file, for processing exactly same events • Comparisons for other pions and electrons were not ready in time, left for next week • Document plots in terms of CVS tags • Investigate origin of discrepancies

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