Speaker
Description
Two-particle correlation analysis serves as a powerful tool for probing the space-time evolution and dynamical properties of particle-emitting sources produced in relativistic heavy-ion collisions. The experimentally extracted source radii reflect the system's spatial extent at kinetic freeze-out, the final stage where particles stop interacting. Compared to pions, kaons offer enhanced sensitivity for source characterization due to their significantly reduced hadronic interaction cross sections and minimal contamination from long-lived resonance decays.
In this study, we present systematic measurements of $K^{+}K^{+}$ correlation functions in Au+Au collisions at $\sqrt{s_{NN}}$ = 3.0, 3.2, 3.5, and 3.9 GeV using the STAR detector at RHIC. Through a rigorous fitting procedure employing the Bowler-Sinyukov formalism, we quantitatively determine the one-dimensional effective source radius ($R_{inv}$) and correlation strength parameter ($\lambda$). A comprehensive comparison between the experimental results and the predictions of the UrQMD+CRAB model provides critical insights into the collision dynamics in the high baryon density region of the QCD phase diagram.
