CBM Performance for Λ Hyperon Directed Flow Measurements in Au + Au Collisions at 12<i>A</i> GeV/<i>c</i>

Abstract

We present the current status of the performance studies of Λ hyperon directed flow measurement with the CBM experiment at the future FAIR facility in Darmstadt. Kalman Filter mathematics is used to reconstruct Λ→pπ− weak decay kinematics, while the Particle Finder Simple package is used to optimize criteria for Λ hyperon candidate selection. Directed flow of Λ hyperons is studied as a function of rapidity, transverse momentum and collision centrality. The effects on flow measurement due to non-uniformity of the CBM detector response in the azimuthal angle, transverse momentum and rapidity are corrected using the QnTools analysis framework.

Keywords

• heavy-ion collisions
• CBM experiment at FAIR
• anisotropic flow
• Λ hyperon