Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2002-10-14
Phys.Lett. B557 (2003) 157-166
Physics
Nuclear Physics
Nuclear Experiment
14 pages with 7 figures, submitted to Phys. Lett. B
Scientific paper
Bose-Einstein correlations of charged kaons were measured near mid-rapidity in central Pb+Pb collisions at 158 A$\cdot$GeV by the NA49 experiment at the CERN SPS. Source radii were extracted using the Yano-Koonin-Podgoretsky and Bertsch-Pratt parameterizations. The results are compared to published pion data. The measured $m_\perp$ dependence for kaons and pions is consistent with collective transverse expansion of the source and a freeze-out time of about 9.5 $fm$.
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