Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2004-03-23
J.Phys. G30 (2004) S1059-S1064
Physics
Nuclear Physics
Nuclear Experiment
5 pages, 3 figures, Quark Matter 04 proceedings, submitted to J. Phys. G: Nucl. Phys
Scientific paper
10.1088/0954-3899/30/8/058
STAR has performed a correlation analyses of pion-kaon and pion-proton pairs for sqrt(s_NN)=130 AGeV and sqrt(s_NN)=200 AGeV and kaon-proton, proton-Lambda and pion-Cascade pairs for AuAu collisions sqrt(s_NN)=200 AGeV. They show that average emission space-time points of pions, kaons and protons are not the same. These asymmetries are interpreted as a consequence of transverse radial expansion of the system; emission time differences explain only part of the asymmetry. Therefore our measurements independently confirm the existence of transverse radial flow. Furthermore, correlations of strange hyperons is investigated by performing proton-Lambda and pion-Cascade analyses, giving estimates of source size at high m_{T}. The strong interaction potential between (anti-)proton and lambda as well as kaon and proton is investigated.
for the STAR Collaboration
Kisiel Adam
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