Is the existence of a softest point in the directed flow excitation function an unambiguous signal for the creation of a quark-gluon plasma?

Details Is the existence of a softest point in the directed flow excitation function an unambiguous signal for the creation of a quark-gluon plasma? Is the existence of a softest point in the directed flow excitation function an unambiguous signal for the creation of a quark-gluon plasma?

2002-05-27

arxiv.org/abs/nucl-th/0205069v1

Phys.Lett. B612 (2005) 201-206

Physics

Nuclear Physics

Nuclear Theory

4 pages, 2 figures

Scientific paper

10.1016/j.physletb.2005.02.035

The excitation function of the in-plane directed flow of nucleons is studied within a non-equilibrium transport approach. It is demonstrated that a local minimum in the excitation function of the directed flow develops, which is not related to a transition into a quark-gluon plasma (QGP) phase. It is a consequence of the dynamical softening of the underlying equation of state, due to the onset of resonance matter and particle production. Thus, the interpretation of this minimum as a 'smoking gun' signature for the creation of a QGP is premature.

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