Speaker
Description
Relativistic heavy-ion collisions provide a unique setting to investigate nuclear matter under varied temperatures and densities with various probes. Strangeness production serves as a sensitive probe into the properties of the Quark-Gluon Plasma (QGP). Measurements of femtoscopic correlations in high-energy heavy-ion collisions aim to unravel the space-time structure of the particle-emitting source including the formation of new state of nuclear matter − QGP.
In this talk, we will present the results of meson production in Au+Au collisions at energy 19.6 GeV using high-precision, high-statistics datasets from phase two of the STAR Beam Energy Scan (BES-II). The spectra of mesons over a wide range of transverse momentum (0.0-6.0) GeV/c and for seven centralities are demonstrates saturation regime for very low transverse momentum. Femtoscopic correlations of meson pairs are sensitive to the final-state interactions as well as to the extent of the region from which the correlated particles are emitted. The one-dimensional correlation function of meson pairs in Au+Au collisions at 19.6 GeV is measured for the first time at STAR. It is described well by a Gaussian distribution and term corresponding to Final State Interaction. Two model parameters − the source size (R) and the correlation strength (λ), are extracted. The dependence of the parameters on average transverse momentum, and centrality will be given.
