A fast centrality-meter for heavy-ion collisions at the CBM experiment

  • A new method of event characterization based on Deep Learning is presented. The PointNet models can be used for fast, online event-by-event impact parameter determination at the CBM experiment. For this study, UrQMD and the CBM detector simulation are used to generate Au+Au collision events at 10 AGeV which are then used to train and evaluate PointNet based architectures. The models can be trained on features like the hit position of particles in the CBM detector planes, tracks reconstructed from the hits or combinations thereof. The Deep Learning models reconstruct impact parameters from 2-14 fm with a mean error varying from -0.33 to 0.22 fm. For impact parameters in the range of 5-14 fm, a model which uses the combination of hit and track information of particles has a relative precision of 4-9% and a mean error of -0.33 to 0.13 fm. In the same range of impact parameters, a model with only track information has a relative precision of 4-10% and a mean error of -0.18 to 0.22 fm. This new method of event-classification is shown to be more accurate and less model dependent than conventional methods and can utilize the performance boost of modern GPU processor units.

Download full text files

Export metadata

Author:Manjunath Omana KuttanORCiDGND, Jan SteinheimerORCiDGND, Kai ZhouORCiD, Andreas RedelbachORCiD, Horst StöckerORCiDGND
Parent Title (German):Physics Letters B
Place of publication:Amsterdam [u.a.]
Document Type:Article
Date of Publication (online):2020/10/20
Date of first Publication:2020/10/20
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2020/10/29
Page Number:8
Institutes:Physik / Physik
Informatik und Mathematik / Informatik
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Licence (German):License LogoCreative Commons - Namensnennung 4.0