Non Identical strange particle correlations in Au-Au collisions at √s_NN= 200 GeV from the STAR experiment · arXivDesk
hep-ex/0404024Apr 21, 20043 pages, 3 figures, contribution to proceedings of the Second Warsaw Meeting on Particle Correlations and Resonances in Heavy Ion Collisions, Warsaw 15-18 Oct 2003, to be published in Nucleonica
Non Identical strange particle correlations in Au-Au collisions at sNN= 200 GeV from the STAR experiment
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−Λ and pˉ−Λ systems are more sensitive to the source size than p−p
Nearby in the stack
pairs. Strong interaction potential has been studied using
p−Λ
, and for the first time,
pˉ−Λ
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
π
-
Ξ
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.