Physics lists - Use cases

The 'old' physics web pages are still available here.

If you have experience and/or comparisions to data in one of the topics below, or a new topic, please contact us via the physics list forum on Geant4 hypernews

High energy physics calorimetry

Comparisons to test beam data of LHC experiments initially used LHEP and QGSP physics lists. Of these two, LHEP is found to be best for the shower shape, and has the best CPU preformance. QGSP slightly better predicts the resolution and e/Pion ratio. Up to release 8.2, QGSP produced the showers shorter and narrower than testbeam data; the inclusion of the quasi-elastic channel since 8.3 results in longer showers in both our simplified tests and in in comparisions to LHC test beam data.

The studies of testbeam data currently show that a cascade model is needed for a good description of hadronic showers; the QGSP_BERT physics lists improves agreement with LHC testbeam data for the longitudinal shape, the lateral shape and for resolution. This list is currently chosen by the LHC experiments ATLAS and CMS as default physics lists.

High energy physics tracker

'typical' HEP collider detector

LHC neutron fluxes

Linear collider neutron fluxes

Shielding applications (all energies)

Low energy dosimetric applications

Medical and industrial neutron applications

Underground physics

The LBE ( Low Background Experiments) physics list was developed for this use case.

air shower

medium energy targets

high energy production targets