Baryon stopping as a signal of the mixed phase onset

Details Baryon stopping as a signal of the mixed phase onset Baryon stopping as a signal of the mixed phase onset

2011-01-11

arxiv.org/abs/1101.2092v1

Physics

Nuclear Physics

Nuclear Theory

6 pages, 3 figures. To appear in proceedings of the 6th Int. Workshop "CPOD 2010" in Dubna, August 22-28, 2010

Scientific paper

It is argued that the experimentally observed baryon stopping indicates a non-monotonous behaviour as a function of the incident energy of colliding nuclei. This can be quantified by a midrapidity reduced curvature of the net-proton rapidity spectrum and reveals itself as a zigzag irregularity in the excitation function of this curvature. The three-fluid dynamic calculations with a hadronic equation of state (EoS) fail to reproduce this irregularity. At the same time, the same calculations with an EoS involving a first-order phase transition and a crossover one into the quark-gluon phase do reproduce this zigzag behaviour, however only qualitatively.

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