Data-Driven Methods for Spectator Symmetry Plane Estimation in CBM Experiment at FAIR

• Main Authors: Oleg Golosov, Ilya Selyuzhenkov, Evgeny Kashirin
• Format: Article
• Language: English
• Published: MDPI AG 2021-07-01
• Series: Particles
• Subjects: heavy-ion collisions; CBM experiment at FAIR; anisotropic transverse flow; event plane resolution
• Online Access: https://www.mdpi.com/2571-712X/4/3/30
• ISSN: 2571-712X

The Compressed Baryonic Matter experiment (CBM) at FAIR aims to study the area of the QCD phase diagram at high net baryon densities and moderate temperatures with collisions of heavy ions at <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msqrt><msub><mi>s</mi><mi>NN</mi></msub></msqrt><mo>=</mo><mn>2.8</mn></mrow></semantics></math></inline-formula>–4.9 GeV. The anisotropic transverse flow is one of the most important observable phenomena in a study of the properties of matter created in such collisions. Flow measurements require the knowledge of the collision symmetry plane, which can be determined from the deflection of the collision spectators in the plane transverse to the direction of the moving ions. The CBM performance for projectile spectator symmetry plane estimation is studied with GEANT4 Monte Carlo simulations using collisions of gold ions with beam momentum of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>12</mn><mi>A</mi></mrow></semantics></math></inline-formula> GeV/<i>c</i> generated with the DCM-QGSM-SMM model. Different data-driven methods to extract the correction factor in flow analysis for the resolution of the spectator symmetry plane estimated with the CBM Projectile Spectator Detector are investigated.