Using the Blast-Wave parameterized model in THERMINATOR 2, we study the effect of the radial flow and resonance decay on the transverse momentum dependence of HBT parameters for Au+Au central collisions at the RHIC energy √ s N N = 200 GeV. The results indicate that the radial flow directly affects the space-momentum correlations and the dependence of the transverse HBT radii on transverse momentum. The rise of α with increasing v T for R out is faster than that for R side which suggests that R out is more susceptible to the radial flow. The pions decayed from resonance increase the HBT radii and strengthen the negative dependence of the radii on transverse momentum.
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