Geant4 Electromagnetic Physics for LHC Upgrade

In this work we present recent progress in Geant4 electromagnetic physics modelling, with an emphasis on the new refinements for the processes of multiple and single scattering, ionisation, high energy muon interactions, and gamma induced processes. The future LHC upgrade to 13 TeV will bring new requirements regarding the quality of electromagnetic physics simulation: energy, particle multiplicity, and statistics will be increased. The evolution of CPU performance and developments for Geant4 multi-threading connected with Geant4 electromagnetic physics sub-packages will also be discussed.

[1]  Robert J. Schneider,et al.  Multiple Coulomb scattering of 160 MeV protons , 1993 .

[2]  S. Elles,et al.  The performance of the geant4 standard EM package for LHC and other applications , 2008 .

[3]  V. Ivanchenko,et al.  Geant4 simulation of production and interaction of muons , 2006, IEEE Transactions on Nuclear Science.

[4]  Ryszard S. Romaniuk,et al.  Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC , 2012 .

[5]  V. Ivanchenko,et al.  Improved description of Bremsstrahlung for high-energy electrons in Geant4 , 2008, 2008 IEEE Nuclear Science Symposium Conference Record.

[6]  Danilo Piparo,et al.  Speeding up HEP experiment software with a library of fast and auto-vectorisable mathematical functions , 2014 .

[7]  P. Arce,et al.  Multiple Scattering in GEANT4. A Comparison with Molière Theory and L3 Detector Data , 2001 .

[8]  K. Lassila-Perini,et al.  Energy loss in thin layers in GEANT , 1995 .

[9]  S. Incerti,et al.  Geant4 electromagnetic physics for high statistic simulation of LHC experiments , 2012 .

[10]  M. Kowalski,et al.  Performance studies with an ALICE TPC prototype , 2006 .

[11]  V. M. Grichine,et al.  Geant4 hadron elastic diffuse model , 2010, Comput. Phys. Commun..

[12]  T. Koi,et al.  Geometry and physics of the Geant4 toolkit for high and medium energy applications , 2009 .

[13]  B. Faddegon,et al.  Measurement of multiple scattering of 13 and 20MeV electrons by thin foils. , 2008, Medical physics.

[14]  A. B. Migdal,et al.  Bremsstrahlung and pair production in condensed media at high-energies , 1956 .

[15]  V. Ivanchenko,et al.  Geant4 models for simulation of multiple scattering , 2010 .

[16]  S. Incerti,et al.  Geant4 developments and applications , 2006, IEEE Transactions on Nuclear Science.

[17]  J. Apostolakis,et al.  An implementation of ionisation energy loss in very thin absorbers for the GEANT4 simulation package , 2000 .