1. Highlights from Parallel session 10 - Simulation and Modeling - Makoto Asai (SLAC) CHEP03 - UC San Diego

2.  It is the great pity that we could not have Dr. G. Battistoni, who had been expected to share the role of session convener.

3. Structure of sessions

4. Monday sessions  Dedicated to general purpose simulation tools (FLUKA and Geant4)  General status reports  Detailed physics models  Validation results from experiments

5. Presentations (Monday - I)  Overview of Geant4 recent developments J.Apostolakis on behalf of Geant4 collaboration  Geant4 hadronic physics status and validation for large HEP calorimeters J.-P.Wellisch  Status of the physics validation studies using Geant4 in ATLAS A.Dell ’ Acqua on behalf of ATLAS Geant4 validation team  The physics models of FLUKA : status and recent developments A.Fasso et. al.  FLUKA : present and future G.Battistoni et. al.

6. Presentations (Monday - II)  String parton models in Geant4 G.Folger et. al.  Bertini inter-nuclear cascade model implementation in Geant4 A.Heikkinen et. al.  Geant4 hadronic validation suite for the cascade energy range V.Ivantchenko et. al.  Validation of Geant4 by the CMS experiment P.Arce et. al.  ALICE experience with G4 I.Gonzalez et. al. for the ALICE collaboration

7. Tuesday session  Dedicated to Concrete simulation (and reconstruction) applications for individual experiments  Status and plans  Frameworks  Requirements  Validation results

8. Presentations (Tuesday)  The full detector simulation for the ATLAS experiment : status and outlook A.Rimoldi et. al.  Simulation application for the LHCb experiment W.Pokorski et. al.  Simulation in ALICE A.Morsch on behalf of the ALICE offline project  CDF detector simulation framework and simulation performance E.Gerchtein et. al.  Using Geant4 in the BaBar simulation D.Wright on behalf of the BaBar simulation group  Overview of GLAST simulation and reconstruction R.Dubois et. al.

9. Thursday session  Geometry modeling  Additional talks on simulation tool or application  Interfacing between more than one simulation tools

10. Presentations (Thursday)  A geometrical modeler for HEP A.Gheata et. al. for the ALICE collaboration  The XML-based geometry description for the STAR experiment at BNL M.Potekhin et. al.  TPC tracking and particle identification in high-density environment M.Ivanov et. al.  Electro and gamma nuclear physics in Geant4 M.Kossov et. al.  Interfacing the JQMD and JAM nuclear reaction codes to Geant4 T.Koi et. al.  Development of an interface for using EGS4 physics processes in Geant4 K.Murakami et. al.

11. Some highlight slides from presentations on general simulation tools and their validation results

51. Some highlight slides form presentations on concrete simulation applications for individual experiments

53. Precision Chambers (MDT) Encap Trigger Chambers (TGC) Barrel Trigger Chambers (RPC) Inner Precision Chambers (CSC)

71. Gamma-ray Large Area Space Telescope

74. Some highlight slides form presentations on geometrical modeling

75. A Geometrical Modeller for HEP René Brun, Andrei Gheata, Mihaela Gheata

78. Practical exercise in XML migration  STAR is studying the feasibility of migrating its detector geometry to XML, leveraging the experience accumulated in the HEP community  Emphasis put on platform neutrality as we intend to generate both GEANT 3.21 and GEANT 4 code from the same XML source  A pilot project under way, with the practical goal to migrate a complete subsystem of the STAR detector to XML, as a feasibility study  Content of the pilot project:  Creation of a parser that generates GEANT 3.21 code from an XML document. Java DOM toolkit chosen for the development of the parser, for completeness and support reasons  Evaluation of the other groups experience and technology with a view to possibly reuse it

79. Some highlight slides form presentations on other topics

86. Let me try to summarize …  Simulation and geometrical modeling are quite hot, active and challenging fields.  Frequent, Harder and tighter requirements from experiments  New SW trends  Simulation tools  Extensive validation and comparison collaborating with experiments are mandatory.  Various results have been already gotten and much more activities are foreseen.  Simulation framework and geometrical modeling  Various activities to unify simulation, reconstruction and analysis  Common geometrical description and persistency  To be standardized??  At least for LHC experiments? – LCG / SC2  Data Challenge for LHC experiments  I would like to thank all the contributors.