Femtoscopy measurements of two-kaon combinations in Au+Au collisions at the STAR experiment

Abstract

Abstract. Relativistic heavy-ion collisions can study the properties of nuclear matter in high-energy experiments like the STAR experiment. One of the methods to learn about the properties of the bulk matter is the femtoscopy technique, which relies on information carried by the particles produced during the collisions. The emission source parameters, like space-time characteristics, can be extracted using the technique. High statistics data from RHIC make it possible to study the correlations between strange particles, like charged and neutral kaons. The pair-wise interactions between the identical kaons that form the basis for femtoscopy are quantum statistics and the Coulomb interaction for K±K±, and quantum statistics and the final-state interaction (FSI) through the f0(980)/a0(980) threshold resonances for KS0KS0. The interactions between non-identical kaons pairs of KS0K± are essential, as the strong FSI is described only by the a0(98O) resonance, which could be a four-quark state. These proceedings will present the femtoscopic measurements of strange particles with charged and neutral kaons correlations in Au+Au collisions at the RHIC energy.