Recent improvements on the description of hadronic interactions in Geant4

Dotti, A.; Apostolakis, J.; Folger, G.; Grichine, V.; Ivanchenko, V. N.; Kosov, M.V.; Ribon, A.; Uzhinsky, V.; Wright, D. H.

doi:10.1088/1742-6596/293/1/012022

Cited by 10 publications

(7 citation statements)

References 16 publications

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“…At the time when the CALICE test beam programme was proposed, there were significant uncertainties in the simulation of shower shapes, and the predictions for the radius, for example, varied between models by up to a factor of two (Mavromanolakis and Ward, 2004). In the meantime, following detailed comparisons with LHC test-beam data, major revisions of all stages of the simulation code have been undertaken (Apostolakis et al, 2010;Dotti et al, 2011) For example, the range of the string-based model has been extended towards lower energy, and in particular the diffraction based Fritiof model does not need any recursion to the old parameterised models to bridge the gap to the low energy cascade models. Also an experimental list was implemented, based on the chiral invariant phase space (CHIPS) model, which covers the full energy range, but is not finally tuned yet.…”

Section: A Shower Simulation Modelsmentioning

confidence: 99%

Experimental tests of particle flow calorimetry

et al. 2016

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Section: A Shower Simulation Modelsmentioning

confidence: 99%

Experimental tests of particle flow calorimetry

et al. 2016

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“…GEANT4 implements various models for hadronic cascades, each covering a specific energy region. To provide a description of hadronic interactions over the full relevant energy range, several such models are grouped together into hadronic physics lists [15,18]. In this paper, three physics lists are used: QGSP_BERT, QGSP_BERT_HP and QBBC.…”

Section: Hadronic Cascade Modelsmentioning

confidence: 99%

The time structure of hadronic showers in highly granular calorimeters with tungsten and steel absorbers

Adloff¹,

Blaising²,

Chefdeville³

et al. 2014

J. Inst.

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The intrinsic time structure of hadronic showers influences the timing capability and the required integration time of hadronic calorimeters in particle physics experiments, and depends on the active medium and on the absorber of the calorimeter. With the CALICE T3B experiment, a setup of 15 small plastic scintillator tiles read out with Silicon Photomultipliers, the time structure of showers is measured on a statistical basis with high spatial and temporal resolution in sampling calorimeters with tungsten and steel absorbers. The results are compared to GEANT4 (version 9.4 patch 03) simulations with different hadronic physics models. These comparisons demonstrate the importance of using high precision treatment of low-energy neutrons for tungsten absorbers, while an overall good agreement between data and simulations for all considered models is observed for steel.

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“…Essentially, given a point in space, the value of the magnetic field is obtained by interpolation from a regular grid of values [37]. As for the physics, we use the recommended reference physics list FTFP_BERT [38].…”

Section: A Real-world Particle Detector: Cmsmentioning

confidence: 99%

Efficient discrete-event based particle tracking simulation for high energy physics

Santi

Rossi

Castro

2021

Computer Physics Communications

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This work presents novel discrete event-based simulation algorithms based on the Quantized State System (QSS) numerical methods. QSS provides attractive features for particle transportation processes, in particular a very efficient handling of discontinuities in the simulation of continuous systems. We focus on High Energy Physics (HEP) particle tracking applications that typically rely on discrete timebased methods, and study the advantages of adopting a discrete event-based numerical approach that resolves efficiently the crossing of geometry boundaries by a traveling particle. For this purpose we follow two complementary strategies. First, a new co-simulation technique connects the Geant4 simulation toolkit with a standalone QSS solver. Second, a new native QSS numerical stepper is embedded into Geant4. We compare both approaches against the latest Geant4 default steppers in different HEP setups, including a complex realistic scenario (the CMS particle detector at CERN). Our techniques achieve relevant simulation speedups in a wide range of scenarios, particularly when the intensity of discrete-event handling dominates performance in the solving of the continuous laws of particle motion.

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Recent improvements on the description of hadronic interactions in Geant4

Cited by 10 publications

References 16 publications

Experimental tests of particle flow calorimetry

Experimental tests of particle flow calorimetry

The time structure of hadronic showers in highly granular calorimeters with tungsten and steel absorbers

Efficient discrete-event based particle tracking simulation for high energy physics

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