Identified charged hadron production in Au + Au collisions at s N N = 54.4 GeV with the STAR detector

We present results on the production of π±, K±, p, and p̄ in Au+Au collisions at √sNN = 54.4~GeV using the STAR detector at RHIC, at midrapidity ($|y| <$ 0.1). Invariant yields of these particles as a function of transverse momentum are shown. We determine bulk properties such as integrated particle yields ($dN/dy$), mean transverse momentum (pT), particle ratios, which provide insight into the particle production mechanisms. Additionally, the kinetic freezeout parameters (Tₖin and βT), which provide information about the dynamics of the system at the time of freezeout, are obtained. The Bjorken energy density (εBJ), which gives an estimate of the energy density in the central rapidity region of the collision zone at the formation time $τ$, is calculated and presented as a function of multiplicity for various energies. The results are compared with those from the models such as A Multi-Phase Transport (AMPT) and Heavy Ion Jet INteraction Generator (HIJING) for further insights.