System-size scan of dihadron azimuthal correlations in ultra-relativistic heavy ion collisions

Details System-size scan of dihadron azimuthal correlations in ultra-relativistic heavy ion collisions System-size scan of dihadron azimuthal correlations in ultra-relativistic heavy ion collisions

2011-05-13

arxiv.org/abs/1105.2743v1

Physics

Nuclear Physics

Nuclear Theory

8 pages, 4 figures, 1 table; Nucl. Phys. A (accepted)

Scientific paper

System-size dependence of dihadron azimuthal correlations in ultra-relativistic heavy ion collision is simulated by a multi-phase transport model. The structure of correlation functions and yields of associated particles show clear participant path-length dependences in collision systems with a partonic phase. The splitting parameter and root-mean-square width of away-side correlation functions increase with collision system size from $^{14}$N+$^{14}$N to $^{197}$Au+$^{197}$Au collisions. The double-peak structure of away-side correlation functions can only be formed in sufficient "large" collision systems under partonic phase. The contrast between the results with partonic phase and with hadron gas could suggest some hints to study onset of deconfinment.

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