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Comparision of Data and MC

Comparision of Data and MC. A. Chukanov , S. Dmitrievsky , Yu . Gornushkin , D. Naumov JINR, Dubna Opera collaboration meeting 9 th March 2011, Nagoya. Outline. Signal attenuation in strips Cross-talks simulation Geant 4 running Summary. Signals from an isolated muon.

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Comparision of Data and MC

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  1. ComparisionofDataand MC A. Chukanov, S. Dmitrievsky, Yu. Gornushkin, D. Naumov JINR, Dubna Operacollaborationmeeting 9thMarch 2011, Nagoya

  2. Outline • Signal attenuation in strips • Cross-talks simulation • Geant 4 running • Summary

  3. Signals from an isolated muon Signals from the left and right PMT’s are not well discribed by MC

  4. Model of light attenuation in a fiber Eright Eleft E0 PMTleft PMTright x 0 dL dL L0 = 686 cm

  5. Light attenuation paramerization Parametrization according to attenuation distributions for all detector (calibration) OpDigit: parametrization from muon tracks.16different parameters for light attenuations for all detector

  6. Signals from an isolated muon OpDigit New para- metrization

  7. Cross-talks 1 8 Δ=9 Δ=8 Δ=7 PMT Δ=1 Δ=-1 56 64 Δ=-7 Measured CT fraction is equal 7.4%. Δ=-8 Δ=-9

  8. Cross-talks parametrisation CT Energy/Energy in plane, Threshold = 0.3 p.e. Measured from muon tracks CT fraction: 5.3%

  9. New paramerization for neutrino events v 4.0 new

  10. Event simulation VMC allow us to use different tracing programs: • Geant 3 • Geant 4 • Fluka (for internal use only) Only Geant 3 is using now

  11. Event generation • Charmed hadrons and t-leptons • are decayed in PYTHIA • New names were introduced • Valid for the t-leptons nm “OPERA” particle replaces t and charm • Not valid for the charmed hadrons • Geant 4 crashs because of introduction of “OPERA” particles nm Charmed hadrons

  12. Applying Geant 4 tracing • OpSim scripts modification (manual is coming soon) • Short live particles donot decay at event genertion level • PYTHIA as external decay program at particle transportation level Longercomputation time, need to choose proper physics list

  13. Geant 3 and Geant 4 tracing programs - preliminary GEANT 3 GEANT 4

  14. Summary • TT fibers attenuation from testing beam gives a better Data by MC description • Recalculated cross-talks fraction from 7.4% to 5.3% • Migration toGeant 4as transportation program

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