# Presentation: 933814

## Generators & Detector Simulations Report

- V. Daniel Elvira
- CD Project Report

## Outline

-  Physics research, both theory and experiment: HEP phenomenology, D0, CMS  (not reported today)
-  LCG- HepMC/HepPDT development (L. Garren)

**Outline**

- _Today:_
-  GDS and G4/FNAL Groups Activities Overview +
- CMS/LPC Simulation Activities and Support (Daniel Elvira)
-  Generators (Steve Mrenna)
-  G4 time performance (Mark Fischler)
-  G4 hadronic physics (Sunanda Banerjee)

## The FNAL/G4 Proposal

**Hadronic Physics (HP):**
- - Use existing/future experimental measurements of p, ,  cross sections and interaction products in the 1-20 GeV energy range.
-  Collection/maintenance of a repository of validation material from Geant4 developers and users linked to the Geant4 web pages.
-  Identification of gaps in the validation for which models and physics lists have not been sufficiently tested, or validated for several years.
**Performance & Reliability (P&R):**
- Detect and fix potential features that affect the time performance and reliability of Geant4 application codes.

- Our G4 FNAL group presented a proposal to join the Geant4 Collaboration in early March. (_[https://plone4.fnal.gov/P1/Main/wiki/GDS-CDGroup](https://plone4.fnal.gov/P1/Main/wiki/GDS-CDGroup)__ contains all GDS planning documents, reports, useful information including the proposal)._

- _Positive review from G4 Steering Board (SB)_ to be followed by a recommendation from John Apostolakis to the _Oversight Board (OB)_ for approval. The SB asked us to meet with hadronic physics leaders & developers to fine-tune HP work plan, which happened on 4/13/2007.

## The FNAL/G4 Proposal

- The Fermilab effort is expected to ramp up to a level of  2 FTE by the end of  the first quarter of 2007. A total of 1.4 FTE for Hadronic Physics & Validation and 0.6 FTE to Performance & Reliability. The list of prospect contributors is detailed below. - Julia and Sunanda to contribute 0.4 FTE each to CMS/LPC -
- Name                       e-mail address                             Title             Activity
- Sunanda Banerjee    _[sunanda.banerjee@cern.ch](mailto:sunanda.banerjee@cern.ch)_    App. Phys.      Had.Phys & Valid
- Julia Yarba              _[yarba_j@fnal.gov](mailto:yarba_j@fnal.gov)_                   Comp. Prof.    Had. Phys & Valid
- Daniel Elvira            _[daniel@fnal.gov](mailto:daniel@fnal.gov)_                      Scientist        Had. Phys & Valid
- Mark Fischler          _[mf@fnal.gov](mailto:mf@fnal.gov)_                          App. Scient.    Perf. & Reliab.
- Marc Paterno           _[paterno@fnal.gov](mailto:paterno@fnal.gov)_                   Comp. Prof.    Perf. & Reliab.
- Jim Kowalkowski      _[jbk@fnal.gov](mailto:jbk@fnal.gov)_                          Comp. Prof.     Perf. & Reliab.

**The FNAL/G4 Proposal**

- _Work has already started_ (see presentations by M.Fischler and S. Banerjee). No access to meetings or mailing lists yet but...
-  G. Cosmo provided our team access to development releases.
-  Progress must be reported directly to G. Cosmo/J. Apostolakis ( P&R), D. Wright/J. Apostolakis (HP)

## CMS/LPC Contributions

-  _The Validation Project_ – generated significant activity at LPC

*SVSuite (for release validation)* was born at the LPC, merged with *SDPValidation task*, now it branched off as part of offline (March 1st 07)
- _Daniel no longer leads the effort_ – part of “Software Tools” (A. Pfeiffer, D. Lange)
-  _[https://twiki.cern.ch/twiki/bin/view/CMS/SdpValidation](https://twiki.cern.ch/twiki/bin/view/CMS/SdpValidation)_  (status/final talk)
- 34 simu+reco packages, MCProd integration and DQM based prototype in progress.

-  _LPC-Simulations_ – generating new activities

*GFlash parameterization of hadronic showers* – a tool to tune full simulation to data (Test Beam, collider) for physics accuracy.
- USCMS (LPC) Team: R. Godang & R. Kroeger (Mississippi), Soon Jun & M. Paulini (Carnegie-Mellon), Anwar Bhatti (Rockefeller) + others from central CMS

*MC/data overlap tool for physics analysis* – a tool to provide a realistic simulation of u.e., pile-up, multiple interactions
- USCMS (LPC) Team: Mike Hildreth (Notre Dame) ? (TBC)

- Data driven MC !

*Tracker upgrade simulation* – LPC activity mostly driven by H. Cheung

## CMS/LPC Contributions

- _Julia Yarba_: infrastructure development (particle gun, vertex smearing, now local magnetic field management), integration (simulation chain, validation suite), testing (debugging & timing studies), and support (questions, tutorials)
- _Sunanda Banerjee:_ infrastructure development (geometry interface & user support). Development and support in the area of G4/Test Beam physics validation, geometry.
- _Responsibilities in central CMS (D. Elvira):_  simulation group co-coordination (current). Software and Detector Performance Validation, SDPV (finalized).

## Summary

-  Invited to the Geant4 Collaboration meeting in England (September 13-19th) although not members yet.
-  Continued/expanded simulations activities involving USCMS institutions at the LPC.
-  Would benefit from the 1 FTE missing wrt the Detector Simulation tactical plan: 0.3 FTE for G4 development, 0.7 for general support.

**Summary**