Proton-Λ [Proton - lambda] correlations in central Pb + Pb collisions at √sNN [square root of s subscript NN] =17.3 GeV
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The momentum correlation between protons and Λ [lambda] particles emitted from central Pb+Pb collisions at √sNN=17.3 [square root of s subscript NN = 17.3] GeV was studied by the NA49 experiment at the CERN Super Proton Synchrotron. A clear enhancement is observed for small relative momenta (qinv<0.2 [q subscript inv <0.2] GeV). By fitting a theoretical model, which uses the strong interaction between the proton and the Λ [lambda] in a given pair, to the measured data, a value for the effective source size is deduced. Assuming a static Gaussian source distribution, we derive an effective radius parameter of RG=3.02±0.20(stat.)-0.16+0.44(syst.) [RG = 3.02±0.20 (stat.) subscript -0.16 superscript +0.44 (syst.)] fm.
Date issued
2011-05Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical review C
Publisher
American Physical Society
Citation
Anticic, T. et al. “Proton-Λ correlations in central Pb+Pb collisions at sqrt[s_{NN}]=17.3 GeV.” Physical Review C 83, 054906 (2011): n. pag. ©2011 American Physical Society
Version: Final published version
ISSN
0556-2813