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arXiv · 1107.3477

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

Wei-ning Zhang·Hong-Jie Yin·Yan-Yu Ren
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Abstract

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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Wei-ning Zhang, Hong-Jie Yin, Yan-Yu Ren. 2011-08-22. Two-pion interferometry for the granular sources in ultrarelativistic heavy ion collisions. https://doi.org/10.1088/0256-307x%2F28%2F12%2F122501

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