Speaker
Description
Oleksii Lubynets $^{(1, 2)}$ and Ilya Selyuzhenkov $^{(1, 3)}$ for the CBM Collaboration
$^{(1)}$ GSI, Darmstadt, Germany
$^{(2)}$ Goethe Universität Frankfurt, Frankfurt am Main, Germany
$^{(3)}$ NRNU MEPhI, Moscow, Russia
The main goal of the CBM experiment is to study highly compressed baryonic matter
produced in collisions of heavy ions. The SIS-100 accelerator at FAIR will give a possibility
to investigate the QCD matter at temperatures up to about 120 MeV and net baryon
densities 5-6 times the normal nuclear density. Hyperons produced during the dense phase
of a heavy-ion collision provide information about the equation of state of the QCD matter.
The measurement of their anisotropic flow is important for understanding the dynamics and
evolution of the QCD matter created in the collision.
We will present the status of the performance studies for Λ hyperon directed flow
measurement with the CBM experiment at FAIR. Λ hyperons decay within the CBM detector
volume and are reconstructed via their decay topology. The Particle-Finder Simple package,
which provides an interface to the Kalman Filter Particle (KFParticle) mathematics, is used to
reconstruct $\Lambda \rightarrow p+\pi^-$ decay kinematics and to optimize criteria for $\Lambda$ hyperon candidate
selection. Directed flow of $\Lambda$ hyperons calculated using different flow measurement
techniques 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 package.
