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update on geant4 – test beam data comparison for pions and protons

update on geant4 – test beam data comparison for pions and protons. C. Alexa, S. Constantinescu, S. Diţă, IFIN, Bucharest. 2002 test-beam data ATHENA 11.0.1 and 11.0.5 with GEANT 4.7.1 and QGSP_GN GEANT 4.5.2 with LHEP 3.6, QGSP 2.3 and QGSP2.7. changes in athena11.0.5:

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update on geant4 – test beam data comparison for pions and protons

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  1. update on geant4 – test beam data comparison for pions and protons C. Alexa, S. Constantinescu, S. Diţă, IFIN, Bucharest • 2002 test-beam data • ATHENA 11.0.1 and 11.0.5 with GEANT 4.7.1 andQGSP_GN • GEANT 4.5.2 with LHEP 3.6, QGSP 2.3 and QGSP2.7

  2. changes in athena11.0.5: • use of Fit Filter method not only for real data but also for Geant4 data with exactly the same pulse shapes, cuts, parameters etc. (while before we were not doing this for simulated data) • extra noise in PMT due to photoelectron statistics it is switched on by default for test-beam simulation and cosmic muons simulation, but not yet for ATLAS default simulation

  3. test-beam setup (standalone) 2002-2003 extended barrel module extended barrel module

  4. pion energy resolution

  5. pion energy resolution

  6. pion energy resolution

  7. proton energy resolution

  8. pion linearity G4.7.1 QGSP_GN G4.5.2 LHEP 3.6 G4.5.2 QGSP 2.3 G4.5.2 QGSP 2.7

  9. proton linearity G4.7.1 QGSP_GN QGSP_GN G4.5.2 LHEP 3.6 G4.5.2 QGSP 2.7 G4.5.2 QGSP 2.3

  10. electron/pion G4.5.2 LHEP 3.6 G4.5.2 QGSP 2.7 G4.7.1 QGSP_GN

  11. electron/proton G4.5.2 LHEP 3.6 G4.5.2 QGSP 2.7 G4.7.1 QGSP_GN

  12. pion/proton G4.5.2 LHEP 3.6 G4.5.2 QGSP 2.7 G4.7.1 QGSP_GN

  13. conclusions: • energy resolution: G4.7.1 and QGSP_GN -> better description of the test-beam data • fit filter method in athena11.0.5 -> worse energy resolution • QGSP_GN -> worse linearity, e/π, e/p and π/p • further analysis: • CTB • leakage corrections • shower shape, etc.

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