Centrality determination in heavy-ion collisions with the CBM experiment

International Conference on Particle Physics and Astrophysics

物理学;天文学

Klochkov^1,2 ; Selyuzhenkov, I.^2

Goethe University Frankfurt, Max-von-Laue-Straße 1, Frankfurt am Main, Germany^1

GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, Darmstadt, Germany^2

关键词: Collision geometry;    Compressed baryonic matters;    Facility for antiproton and ion research;    Forward rapidity;    Heavy ion collision;    Mid-rapidity;    Particle multiplicity;    Tracking system;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012059/pdf
DOI  :  10.1088/1742-6596/798/1/012059

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The size and evolution of the medium created in a heavy-ion collision depends on collision geometry. Experimentally collisions can be characterized by the measured particle multiplicities around midrapidity or by the energy measured in the forward rapidity region, which is sensitive to the spectator fragments. In the Compressed Baryonic Matter (CBM) experiment at the future Facility for Antiproton and Ion Research (FAIR) the multiplicity of produced particles is measured with the silicon tracking system (STS). The projectile spectator detector (PSD) measures the energy of spectator fragments. We present the procedure of collision centrality determination in CBM and its performance using the PSD and the STS information.