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Abstract
We systematically investigate the pion transverse momentum spectrum,
elliptic flow, and Hanbury-Brown-Twiss (HBT) interferometry in the granular
source model of quark-gluon plasma droplets in ultra-relativistic heavy ion
collisions. The granular source model can well reproduce the experimental
results of the Au-Au collisions at p
sNN = 200 GeV and the Pb-Pb collisions at p
sNN = 2.76 TeV with different centralities. We examine the parameters of
the granular source models with an uniform and Woods-Saxon initial energy
distributions in a droplet. The parameters exhibit certain regularities for
collision centrality and energy.