1. Summary of Software Components and Libraries Track Computing in High Energy and Nuclear Physics 13-17 February 2006, T.I.F.R. Mumbai, India P. Hristov, L. Moneta CERN

2. P. Hristov, L. Moneta 2 Summary ✦ Review of LCG Application area software ✦ Data Management ✦ Historical overview (J. Shiers) ✦ ROOT I/O ✦ Relation Databases (4 talks) ✦ Condition Databases (3 talks) ✦ Reflection in C++ (2 talks) ✦ Math and Statistical libraries and tools (5 talks) ✦ Geometry representation (3 talks) ✦ Graphics and Visualization (6 talks) ✦ Visualization for quantitative analysis in nuclear physics (S. Niranjani) ✦ MC Generators services (2 talks) ✦ Integrated development environment (Eclipse) ✦ Total of 32 talks (2 missing, no-show )

3. P. Hristov, L. Moneta 3 LCG Application Software  Common Application software for the experiments (P. Mato)  Goals  Minimize duplications  Software re-use  Simplify use of external libraries  integration elements (dictionaries, scripting, plug-in management )  LCG AA Projects:  SPI, ROOT, POOL, SIMU  seek confirmation that all products developed are used by the experiments  crucial to keep strong contacts with experiments 3

4. P. Hristov, L. Moneta, 4 ROOT I/O  Recent developments of ROOT I/O and Trees (P. Canal)  exhaustive list of new features introduced recently in ROOT Main focus: Consolidation (Thread Safety) Generic Object Reference support User defined reference objects supported by User defined reference handlers (proxies) Important features requested by the experiments are implemented

5. P. Hristov, L. Moneta 5 Relational DataBases ✦ CORAL (I. Papadopoulos) ✦ a software system for vendor-neutral access to relational databases POOL (G. Govi) ✦ CORAL integrated in the software of LHC experiments (CMS, ATLAS and LHCb) ✦ directly (i.e. on-line applications) ✦ indirectly (COOL, POOL)

6. P. Hristov, L. Moneta 6 Relational DataBases (Experiments View) ✦ ATLAS ✦ Distributed DataBase Services Client library (A. Vaniachine) ✦ contribution to CORAL ✦ A Flexible distributed event level metadata system (D. Mallon) ✦ tag database for rapid and efficient event selection ✦ based on POOL collections ✦ implemented in ROOT and relation database back-end ✦ only user of POOL of that functionality

7. P. Hristov, L. Moneta 7 Conditions DataBase ✦ DataBases to store time varying data ✦ COOL : Development and Deployments (A. Valassi) ✦ holds condition data for reconstruction and analysis ✦ access data from PVSS, local file catalog (LFC) and bookeeping ✦ implementation in ORACLE, MySQL and SQLite ✦ Now in deployment phase (ATLAS and LHCb) ✦ fully integrated in experiment frameworks ✦ Benefits from other LCG projects ✦ CORAL, SEAL and 3D project ✦ Performance studies ( poster 338 )

8. P. Hristov, L. Moneta 8 Conditions DataBase (2) ✦ Multiple persistency technologies for the BABAR Condition DataBase ✦ migration is in progress to move away from Objectivity ✦ Conditions DataBase of LHCb (M. Clemencic) ✦ conditions DB conversion service of Gaudi ✦ based on COOL

9. P. Hristov, L. Moneta 9 C++ Reflection ✦ Reflex (S. Roiser) ✦ an important step in the consolidation of C++ Reflection Software ✦ JIL (D. Lawrence) ✦ tool to make object persistent (serializer) ✦ support for legacy file formats and allow metadata ✦ satisfy only specific requirements (GlueX experiment)

10. P. Hristov, L. Moneta 10 ✦ New Developments of ROOT Mathematical Libraries ✦ new Vector package (3D and 4D) ✦ SMatrix (for small matrices with fixed size) Mathematical and Statistical Libraries ✦ Fitting and Minimization ✦ Minuit2 (C++) ✦ Linear Fitter ✦ Robust Fitter ✦ SPlot (unfolding)

11. P. Hristov, L. Moneta 11 ✦ Repository for Physics Statistical Software ✦ many statistical code available on individual base ✦ Loose control from moderators ✦ Web site has been established (with policies for submitting) ✦ Next: classification/validation, extending the scope (adding extensions, enhance portability, etc..) ➡ Added value is from users (submit code, provide comments and feedback) Mathematical and Statistical Tools (1)

12. P. Hristov, L. Moneta 12 ✦ Power of Goodness of Fit tests (M.G. Pia) ✦ test statistical power of the various tests available in the toolkit ✦ classify tests as a function of distribution characteristics: ✦ skewness and tail-weight ✦ presented results for un-binned distributions ✦ no clear winner ✦ interesting results ✦ recommendation: ✦ first classify distributions ✦ choose most appropriate tests ✦ publication with results in progress Mathematical and Statistical Tools (2) ➡ valuable tool for the HEP community

13. P. Hristov, L. Moneta 13 ✦ StatPatternRecognition (I. Narsky) ✦ C++ package for multivariate classification of event data ✦ used in BaBar data analysis ✦ Boost Trees give significant improvements with respect to other methods (Neural network) ✦ it would be very useful for LHC data analysis ✦ package has some external dependencies (on some BaBar software, CLHEP, CERNLIB, ROOT) ✦ would be nice if could be used easily from ROOT (like RooFit) Mathematical and Statistical Tools (3)

14. P. Hristov, L. Moneta 14 ✦ Operation Research in HEP (A. De Min) ✦ Examples of application of Linear Programming techniques in high energy physics ✦ Linear Programming: ✦ minimize linear function subject to some constraints ✦ used a lot in logistic and schedule optimizations (airlines) ✦ possible application in HEP: ✦ patter recognition and outliers removal ✦ detector alignment ✦ analysis optimization ✦ various tools (library) available ✦ commercially and as open source packages Mathematical and Statistical Tools (4)

15. P. Hristov, L. Moneta 15 PAX ✦ PAX Toolkit (Physics Analysis Expert) (S. Kappler) ✦ valuable the possibility to define set of competitive physics processes (signal and background) ✦ probably missing some functionality (kinematic constraints) 15

16. P. Hristov, L. Moneta 16 Geometry Modeling and Description (1) ✦ ROOT Geometry ✦ New features in ROOT geometrical modeler for representing non ideal geometries (A. Gheata) add misalignments in perturbative approach ✦ provided support for complex mis- alignment of geometrical elements ✦ access to same geometry in simulation and reconstruction ✦ benefits also from the TGeo visualization capabilities ✦ necessary to check for overlaps and extrusions (TGeo functionality)

17. P. Hristov, L. Moneta 17 ✦ can be used as primary geometry description ✦ proved to be very useful to have an application-independent geometry description language ✦ geometry can be moved between applications ✦ GDML : Geometry Description Markup Language (W. Pokorski) ✦ describe GDML and its ✦ Using XML in the Virtual MC framework (M. Potekhin) ✦ used to describe STAR geometry ✦ based on a different description (AGDD) 17 Geometry Modeling and Description (2)

18. P. Hristov, L. Moneta 18 Graphics and Visualization (1) ✦ ROOT 3D Graphics (R. Brun) ✦ use of OpenGL for displaying 3D objects ✦ profit of GL features: ✦ rendering ✦ 3 draw style, vector output, support for composite shapes) ✦ cameras ✦ perspective and orthographic cameras ✦ manipulators, guides, clipping ✦ GL viewer ✦ GL in a ROOT Pad ✦ good performances ✦ can take advantage of hardware acceleration ✦ next step is to have animations ✦ follow track/shower for event display ➡ significant progress in last years

19. P. Hristov, L. Moneta 19 Graphics and Visualization (2) ✦ V-Atlas (V. Tsulaia) ✦ event visualization based on OpenInventor ✦ multifunctional event display ✦ extensively used as debugging tool ✦ going to be used as Event Display at ATLAS Point 1 ➡ complementary to Atlantis ✦ AliEVE : Alice Event Visualization Environment (M. Tadel) ✦ after using VSD and GLED use now CINT scripts and ROOT native GUI ✦ visualize using ROOT GL viewer ➡ completed prototype cycle (investigation/analysis/development) ✦ GLED (M. Tadel) http://www.gled.org http://www.gled.org ✦ A ROOT based framework for dynamic visualization and distributed computing ✦ used also for visualization of ALICE distributed analysis

20. P. Hristov, L. Moneta 20 Physics Work Environment ✦ Eclipse (W. Lavrijsen) ✦ physicist work environment ✦ useful tool for multi-language environment as ATLAS ✦ help in tools integration ✦ can easily interface to external tools (i.e. cmt for building) ➡ Some concerns on heavy resource usage

21. P. Hristov, L. Moneta 21 Conclusions ✦ Significant number of presentations from LCG projects ✦ 7 of the 32 presentations ✦ consolidation of the common software ✦ projects are moving from active development to deployment ✦ Adoption of common software from LHC experiments ✦ success will be defined by their validation and usage ✦ Large use of relational databases through different interfaces ✦ being integrated with existing software systems ✦ Various talks on mathematical and statistical libraries and tools ✦ Some interesting new developments (statistical tools for event classification) ✦ Substantial progress in graphics and visualization software

22. P. Hristov, L. Moneta 22 Acknowledgments ✦ Thanks to all the speakers ✦ very interesting content ✦ high quality presentations ✦ Many thanks to the conference organizer

23. Extra Slides

24. P. Hristov, L. Moneta, 24 Data Management  Evolution of DataBase in HEP (Jamie Shiers)  Evolution of Data Base in HEP from the 92 CHEP conference until now

25. P. Hristov, L. Moneta 25 Algorithms(2) ✦ Kalman filter for track based alignment (E. Widl) ✦ restrict matrix to detector units which have significant correlations with the ones in the current track ✦ propose algorithm to control list of detector units with a threshold to avoid too large values (tune threshold on real track)

26. P. Hristov, L. Moneta 26 MC Generators for LHC ✦ MonteCarlo Generator Services for LHC (M. Kirsanov) ✦ guarantee the generator support for LHC ✦ GENSER (Generator Service Library) ✦ provide various level of testing ✦ portability to new compilers (gcc4) ✦ collaborate with MC authors to provide support ✦ standardize on a common MC truth format (HEPMC) ✦ MCDB (data base) keep track of full generation chain, storage for shared event ✦ CEDAR (B.M. Waugh) ✦ archive of HEPDATA ✦ tools for validating and tuning models (PDF’s) ✦ XML data format ✦ HZTool ✦ includes data from various expts ✦ takes data from HEPEVT ✦ have utilities ✦ RIVET ( OO to replace HZTool) ✦ make use of existing libraries ✦ newer interfaces HEPMC or AIDA ✦ move to use GENSER