NUKLEONIKA 2004, 49(Supplement 2):s57-s60

NON-IDENTICAL STRANGE PARTICLE CORRELATIONS IN Au+Au COLLISIONS AT ÖsNN = 200 GeV FROM STAR EXPERIMENT

Gaël Renault for the STAR Collaboration

Laboratoire de Physique Subatomique et des Technologies Associées, University of Nantes - IN2P3/CNRS - Ecole des Mines de Nantes, 4 rue Alfred Kastler, F-44307 Nantes Cedex 03, France


Information about the space-time evolution of colliding nuclei can be extracted correlating particles emitted from nuclear collisions. The high density of particles produced in the STAR experiment allows the measurement of non-identical strange particle correlations. Due to the absence of Coulomb interaction, p-L and (anti)pL systems are more sensitive to the source size than p-p pairs. Strong interaction potential has been studied using p-L, and for the first time, (anti)pL pairs. The experimental correlation functions have been described in the frame of a model based on the p-n interaction. The first preliminary measurement of p-X correlations has been performed, allowing to extract information about the freeze-out time and the space-time asymmetries in particle emission closely related to the transverse radial expansion and decay of resonances.