1. Summary for the Physics Lists session (Thursday)
9/13/2018
Summary for the Physics Lists session (Thursday)
Mikhail Kosov, Lisbon, 2006

2. Summary (Reference PL, G.Folger)
LHC experiments rely on reference physics lists
Request better integration
Use only very few lists
Structure has been improved with 8.0 and 8.1
Block per type of physics
Easier update/improvement of these building blocks
Improved models made available
Gamma Nuclear is included by default
Better elastic scattering (CHIPS for pp and np)
Improved stopping physics (CHIPS stopping)
October 13, Lisbon
M.Kosov. Physics Lists Summary

3. SLAC Physics Lists (D. Wright)
9/13/2018
SLAC Physics Lists (D. Wright)
LCPhys
for linear collider calorimetry
Space electronics physics list
for component damage in space radiation environment
A01
demonstration of double arm spectrometer
BaBar
BaBar detector simulation
GLAST
gamma ray satellite simulation
October 13, Lisbon
M.Kosov. Physics Lists Summary

4. Physics Lists in Advanced Examples (M.G.Pia)
Ad hoc in most examples: transparent, easy to understand
A couple use pre-packaged Geant4 PhysicsLists
Goal: document quantitatively the validation of the physics selections of all advanced examples
Objectively supported physics options rather than “educated guess” PhysicsLists
Strategy
Specific validation studies with ad hoc experimental data
Generic validation studies of processes/models used
October 13, Lisbon
M.Kosov. Physics Lists Summary

5. QBBC Default (V. Ivanchenko)
High Energy
QGSC for p, n, π±
FTFC for K± , pbar, nbar
LHEP for the rest
Intermediate Energy
Binary for p, n
Bertini for π±, K± , Λ, Σ
CHIPS for pbar, nbar, …
CHIPS for stopping
October 13, Lisbon
M.Kosov. Physics Lists Summary

6. Installation problems (G.Cosmo)
Physics lists installation not part of the default Geant4 libraries installation
Must be done “manually”
Requires a double step to users
Environment generated by the Configure script does not take into account issues related to physics lists installation
Users are required to first configure their environment and then modify it to manually build the physics lists
Complicates integration of Geant4 inside existing frameworks
Makes use of the EXTRALIBS environment variable
Variable reserved for integration of user libraries or third party libraries
Forces users to take care of linking order of libraries
Does not follow the standard Geant4 rules for installation of the libraries
Libraries installed in a different path than the rest of the Geant4 libraries
Path which can be configured generating confusion and error-prone setups
Concerns also recently expressed by LHC experiments
Generating major disruption for users
… and burden for users support !
One out of two users building the physics lists hits this problem and expresses concerns
Configuration NOT allowed:
Usage of granular libraries and shared libraries for the physics lists
The others probably don’t even know about the existence of the physics lists
October 13, Lisbon
M.Kosov. Physics Lists Summary

7. Multiple Choice Tree in Physics Lists
G4 Physics Lists as distributed today have not appropriate developer support, while to create an application users need:
examples how to properly use released physics processes
examples how to follow general rules (Particle Revolution)
Approved blocks of physics (e.g. a Multiple Choice Tree: EM, ions, gamma-A, stopping, elastic, inelastic, etc.) 1 2 3 4
5 (E-overlap) EM
Ions
gammaA
Stopping
Elastic
Inelastic 20 21 40 42 00 01 55 41 HP 10
GHAD
CHIPS
LElastic
CHIPS LE ST 31 52 54 11
g,e, m,t 30 32 53 50
GHAD
CHIPS HP
LHEP
QGSC
Binari
CHIPS
000
001 51
300
301
LHEP
Berini
Binary
FTFP
Penelope
Livermor
G4Pi
G4Pion
October 13, Lisbon
M.Kosov. Physics Lists Summary