Summary of Simulation and Reconstruction

1. Summary of Simulation and Reconstruction Shaomin CHEN (Tsinghua University) • Framework and toolkit • Application in ILC detector design Jupiter/Satellites, Mokka/Marlin, Slic/org.lcsim GLD calorimeter LDC HCAL CALICE data processing …

2. Four ILC Detector Concepts • GLD • LDC • SiD • 4th detector concept Large, 3T B-field Most of physics studies rely on precise measurement on multi-jets in the final state. Medium, 4T B-field Small, 5T B-field Particle Flow Algorithm (see Tamaki Yoshioka’s talk) See John Hauptman’s talk

3. Framework and Toolkit • Jupiter/Satellites (Aisa) • Mokka/Marlin (Europe) • Slic/org.lcsim (US) • For large option (GLD) design • Use ROOT as a framework for data model Ties Behnke’s talk • For medium option (LDC) design • Use LCIO as a framework for data model Norman Graf’s talk • For small option (SiD) design • Use LCIO as a framework for data model

4. Jupiter/Satellites Concepts For real data Tools for simulation Tools Satellites URANUS JUPITER METIS Input/Output module set IO JLC Unified Particle Interaction and Tracking EmulatoR Unified Reconstructionand ANalysis Utility Set Monte-Calro Exact hits To Intermediate Simulated output LEDA Library Extention forData Analysis Geant4 based Simulator JSF/ROOT based Framework MC truth generator Event Reconstruction JSF: the analysis flow controller based on ROOT The release includes event generators, Quick Simulator, and simple event display

5. Mokka/Marlin concepts LCGEO Ties Behnke’s talk

6. What is not there Ties Behnke’s talk

7. Slic/org.lcsim concepts LCDD slic lcio Full simulation Norman Graf’s talk Fast simulation GODL lcio lelaps GeomConverter Compact Description HEPREP wired Linear Collider Detector Description Simulator for the LInear Collider Generalized Object Description Language org.lcsim Analysis & Reconstruction Stdhep and LCIO files for signal and Background avaliable on the web

8. Three merge into one? Jupiter/Satellites Mokka/Marlin Slic/org.lcsim

9. Application in Detector Design • Detector optimization using PFA • Calorimeter segmentation study • Pion-zero reconstruction in ECAL+HCAL • Isolated gamma finding in ECAL • HCAL optimization using PFA Tamaki Yoshioka’s talk Hiroaki Ono’s talk Daniel Jeans’ talk Hitoshi Hano’s talk Ties Behnke’s talk

10. Particle Flow Algorithm (PFA) ILC detectors are required good jet energy resolution for the precise measurement of jetty events. Jet energy measured by • Charged (~60%) : Tracker • Photon (~30%) : EM calorimeter • Neutral hadron (~10%) : EM/HD calorimeter Required performance to separate W/Z mass. Hiroaki Ono’s talk

11. Calorimeter Geometry in Jupiter Readout Line =10cm 349.4cm Solenoid TPC Barrel HCAL 229.8cm Barrel ECAL 210cm 270cm Endcap HCAL VTX, IT Barrel.InnerRadius=210cm Endcap ECAL Endcap.InnerRadius=40cm IP Barrel.HalfZ=280cm 419.4cm 280cm 299.8cm Tamaki Yoshioka’s talk

12. Calorimeter Structure Active Layer Absorber Current cell size : 1x1cm Can be changed. ECAL W/Scinti./Gap 3/2/1 (mm) x 33 layers HCAL Fe/Scinti./Gap 20/5/1 (mm) x 46 layers Tamaki Yoshioka’s talk

13. Optimization using PFA With the PFA, we can start detector configuration optimization. - B-field - Calorimeter inner radius - Hadron Calorimeter depth - Calorimeter absorber material - TPC endplate thickness - Calorimeter granularity (Ono-san’s talk) - etc … Check jet Energy resolution Physics events: Zqq(uds) at 91.2 GeV and 350 GeV Tamaki Yoshioka’s talk

14. Calorimeter Segmentation • We studied the cheated/realistic PFA performance with different cell/strip segmentation. • In cheated PFA, Z->qq event has analyzed and charged and neutral cluster overlapping contribute • Ecm=91GeV : Almost no segmentation effect has been observed. • Ecm=350GeV: jet energy resolution decrease by segmentation. • Realistic PFA performance at high energy region is still low jet resolution, should be improved. • 91GeV is used for PFA optimization for now. Hiroaki Ono’s talk

15. Optimization using PFA • Jet energy resolution is studied by using Z→qq events. ILC goal of 30%/√E has been achieved in the barrel region of the Z-pole events. • PFA performance with various GLD configuration has been studied. → High B-field/Large Calorimeter gives better performance as expected. → PFA performance of Pb calorimeter is comparable to that of default configuration. Tamaki Yoshioka’s talk

16. Optimization from isolated  • Motivated by GMSB • Angular Resolution Study • Position Resolution of ECAL cluster • Direction of Reconstructed gamma • Calorimeter Component Dependence • Cell size Dependence • Material Dependence Hitoshi Hano’s talk

17. Resolution of isolated  1 GeV 2 GeV 5 GeV 10 GeV  (mrad)  (mrad) cos cos  (mrad)  (mrad)

18. Results of the isolated  study • Angular resolution of default-GLD Calorimeter (W:1cm) • The angular resolution is estimated to be 125mrad/√(E/GeV) • Dependence on cell size granularity and material dependence (W, Pb) has been studied • No significant difference has been observed between 1cm and 0.5cm • Lead is better than Tungsten for isolated gamma • Energy resolution is same Hitoshi Hano’s talk

19. Pion-zero resolution Daniel Jean’s talk

20. Results of Pion-zero Study Daniel Jean’s talk

21. LDC HCAL Optimization Ties Behnke’s talk

22. ILC Software Test in CALICE Roman Pöschl’s talk

23. Time is short for preparation