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Germinating effort on Geant4 hadronics

Germinating effort on Geant4 hadronics. J. Apostolakis PH/SFT. Areas of Work of SFT in Geant4. Coordination, release preparation (staff) G4 Spokesperson/SB Chair, Release manager/QA Physics Validation (mix of staff/associates/fellow) Thin-target benchmark data

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Germinating effort on Geant4 hadronics

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  1. Germinating effort on Geant4 hadronics J. Apostolakis PH/SFT

  2. Areas of Work of SFT in Geant4 • Coordination, release preparation (staff) • G4 Spokesperson/SB Chair, Release manager/QA • Physics Validation (mix of staff/associates/fellow) • Thin-target benchmark data • Physics Model improvement (mainly by associates) • Hadronic: String models, cascade, CHIPS • EM Physics: Standard (HEP) • Geometry (mix) • Navigation; solids; tracking in field; persistency. In the above areas support and maintenance are included - and are an increasing fraction – as well as validation, testing and development. • Testing: nightly integration tests, regression & release validation • Hosting web site and development tools • Contribute also to other areas, e.g. • Performance improvement – collaborating with FNAL experts, LHC teams • Training courses; multithreading prototype studies, ..

  3. “Basically done” for hadronics? • Recent improvements • Good hadronic shower shape • Energy response in transition region (between models) • But a significant number of other issues • Treatment of neutron (lateral shower shape) • Interactions of hyperons (use outdated LHEP modeling) • Resolution • Missing energy

  4. Challenges • Diversity of Expertise • High-energy nuclear interactions • Diffraction • Cascade • Neutron interactions (low energy) • Effort for support • Identify issue(s) responsible for deviations • Review results for simple setups • Check alternative • Model validation and improvement • Validation can include many contributors • Improve models needs more ‘concentration’

  5. How to move forward • Maintain collaboration • Laboratories (Europe/US/+) • Universities • CERN/SFT Involvement • Associates – duration limitations • Need to re-grow Physics Involvement in SFT • Need combination • Expertise in physics modeling (senior) • Young contributors - validation (+ tuning?) • Long-term contributors (staff)

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