Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-05-02
Physics
Nuclear Physics
Nuclear Theory
5 pages, 6 figures, replaced with new version with correct labels and added references, conclusions are unchanged
Scientific paper
The longitudinal long-range correlations of the triangular flow event plane angles are calculated in a Boltzmann + hydrodynamics hybrid approach. The potential to disentangle different energy deposition scenarios is explored by utilizing two different transport approaches for the early non-equilibrium evolution. In the hadronic transport approach the particle production in high energy heavy ion reactions is mainly governed by string excitation and fragmentation processes which are absent in the parton cascade approach. We find that in both approaches the initial state shows a strong longitudinal correlation of the event plane angles which is diluted but still persists in the final state momentum space distributions of the produced particles. A ridge-like structure can also be caused by near-collinear gluon radiation in a parton cascade approach and does not necessarily prove longitudinal flux tubes in the initial state.
Bass Steffen A.
Bhattacharya Vivek
Greiner Carsten
Petersen Hannah
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