Transparency, Mixing and Reflection of Initial Flows in Relativistic Nuclear Collisions

Details Transparency, Mixing and Reflection of Initial Flows in Relativistic Nuclear Collisions Transparency, Mixing and Reflection of Initial Flows in Relativistic Nuclear Collisions

2005-11-06

arxiv.org/abs/hep-ph/0511058v5

Phys.Lett.B640:155-161,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 4 figures, a significantly extended version

Scientific paper

10.1016/j.physletb.2006.07.044

We propose to use the hadron number fluctuations in the limited momentum regions to study the evolution of initial flows in high energy nuclear collisions. In this method by a proper preparation of a collision sample the projectile and target initial flows are marked in fluctuations in the number of colliding nucleons. We discuss three limiting cases of the evolution of flows, transparency, mixing and reflection, and present for them quantitative predictions obtained within several models. Finally, we apply the method to the NA49 results on fluctuations of the negatively charged hadron multiplicity in Pb+Pb interactions at 158A GeV and conclude that the data favor a hydrodynamical model with a significant degree of mixing of the initial flows at the early stage of collisions.

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