Simulation Validation

This pages is intended to held the information needed for validation of the simulation, from MC samples to generator and reconstructed distributions and reference/documentation to tools.

Validation Tests

	Analysis	Gauss	cmt	CMake	Who	Geant4	cmt	CMake	Who	LHCbPR2
1	Hadronic cross-section	-	-	-		hadr00	Y	Y		Analysis Module - work in progress
2	Hadronic interaction probability	Sim/SimChecks Target	Y	N	Kristian	-				Handler exist, work in progress
3	Hadronic Multiplicity	Sim/SimChecks Target	Y	N	Kristian	-	-	-		Handler exist, work in progress
4	ECAL	-				TestEm3	Y	Y	Tim	Analysis Module exists
5	Multiple scattering in thin layers	-				TestEm5	Y	Y	Tim	Analysis Module exists
6	Multiple Scattering in MUON	Muon/MuonMoniSim	?	?	Ryan	-	-
7	Bremsstrahlung	(Sim/SimChecks EmValidation )	Y	N	Georgios	-	-
8	dE/dex in thin layers	(Sim/SimChecks EmValidation )	Y	N	Georgios	-	-
9	Rad length monitoriting	Sim/SimChecks rad_length_scan	Y	Y	Kristian	-	-			CMT version run in LHCbPR nightlies (merge request #63 for cmake)
10	Sajan Cherenkov tests
11	Marco A RIVET tests
12	Alessio's tests		Y	Y						Run in LHCbPR nightlies
13	Detailed Timing Tests

Samples for validation

A set of samples are necessary for validating a new production version, new versions of Geant4 and of generators. The production of these samples should become automated and the results published on a dedicated web page. This samples are produced by the production system, so that the all chain is exercised.

Two different macro-sets are produced depending on what need to be validated:

• particle-gun, min bias and inclusive samples (sim+digi)
• physics samples (dst files)

The list of samples to be produced routinely should be populated by the MC physics working groups contacts, the detectors, trigger and reconstruction software contacts.
The list of sample produced for MC09 can be found here.

Distributions for validation

• The list of distributions to be verified provided by the physics working groups and by the detectors.
• Generators:
  plots comparing different generators and Gauss versions can be found here
• Validation of simulation phase, May-Be-Not-Up-To-Date
  plots comparing different Geant4 and Gauss versions can be found here
  • Selected recent studies of:
    • hadronic cross-sections, pure G4 study, and upated using FTFP_BERT patch in Geant4 v95r1, adding Al, Be, Si materials
    • hadronic cross-sections and multiplicities using Gaussv43r3, updated to include asymmetries, Gauss v43r3, using Gauss v45r0, with corrected FTFP_BERT cross-sections
    • electromagnetic physics lists
• Radiation Length Scans using G4, Work-In-Progress

Tools for validation and tuning

MC production histograms: monitoring tools

Instructions to use of the Online Tools (OnlineHistDB, Presenter) for monitoring the MC histograms can be found here. May-Be-Not-Up-To-Date

Rivet and Professor

A dedicated package called GenTune is available from Gauss v42r2 for tuning of generators against published data, using Rivet. Instructions and documentation are available from this page.

-- GloriaCorti - 24-May-2011