Two-pion interferometry for the granular sources in ultrarelativistic heavy ion collisions

Details Two-pion interferometry for the granular sources in ultrarelativistic heavy ion collisions Two-pion interferometry for the granular sources in ultrarelativistic heavy ion collisions

2011-07-18

arxiv.org/abs/1107.3477v2

Chinese Phys. Lett. 28 (2011) 122501

Physics

Nuclear Physics

Nuclear Theory

4 pages, 4 figures

Scientific paper

We investigate the two-pion interferometry in ultrarelativistic heavy ion collisions in the granular source model of quark-gluon plasma droplets. The pion transverse momentum spectra and HBT radii of the granular sources agree well with the experimental data of the $\sqrt{s_{NN}}=200$ GeV Au-Au and $\sqrt{s_{NN}}=2.76$ TeV Pb-Pb most central collisions. In the granular source model the larger initial system breakup time may lead to the larger HBT radii $R_{\rm out}$, $R_{\rm side}$, and $R_{\rm long}$. However, the large droplet transverse expansion and limited average relative emitting time of particles in the granular source lead to small ratios of the transverse HBT radii $R_{\rm out}/R_{\rm side}$.

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