Anisotropic flow in Pb plus Pb collisions at LHC from the quark-gluon string model with parton rearrangement

作者：Bleibel J^*; Burau G; Fuchs C

来源：Physics Letters B, 2008, 659(3): 520-524.

DOI：10.1016/j.physletb.2007.11.042

• ultra-relativistic heavy ion collisions
• microscopic quark-gluon string transport model
• directed and elliptic flow
• pseudorapidity and centrality dependence
• recombination of partons

We present predictions for the pseudorapidity dependence of the azimuthal anisotropy parameters nu(1) and nu(2) of baryons and inclusive charged hadrons in Pb + Pb collisions at a LHC energy of,,root(NN)-N-S = 5.5 TeV applying a microscopic transport model, namely the quark-gluon string model (QGSM) which has been recently extended for parton rearrangement and fusion processes. Pb + Pb collisions with impact parameters b = 2.3 fm and b = 8 fm have been simulated in order to investigate additionally the difference between central and semiperipheral configurations. In contrast to V-1(ch)(eta) at RHIC, the directed flow of charged hadrons shows a small normal flow alignment. The elliptic flow nu(ch)(2)(eta) turns out to be rather similar in shape for RHIC and LHC conditions, the magnitude however increases about 10-20% at the LHC, leading to the conclusion that the hydrodynamical limit will be reached.

• 出版日期2008-1-24