Can the energy dependence of elliptic flow reveal the QGP phase transition?

Details Can the energy dependence of elliptic flow reveal the QGP phase transition? Can the energy dependence of elliptic flow reveal the QGP phase transition?

2009-07-24

arxiv.org/abs/0907.4256v2

Nucl.Phys.A830:287c-290c,2009

Physics

Nuclear Physics

Nuclear Theory

Final version, to appear in the proceedings of Quark Matter 2009: 21th International Conference on Ultra-Relativistic Nucleus

Scientific paper

10.1016/j.nuclphysa.2009.09.027

Ideal hydrodynamic simulations are performed to compute the evolution with collision energy of hadron spectra and elliptic flow between AGS and LHC energies. We argue that viscous effects should decrease with increasing energy, improving the applicability of ideal fluid dynamics at higher energies. We show that the increasing radial flow at higher energies pushes the elliptic flow to larger transverse momenta, leading to a peaking and subsequent decrease of the elliptic flow at fixed p_T with increasing collision energy, independent of whether or not there is a phase transition in the equation of state.

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