Novel rapidity dependence of directed flow in high energy heavy ion collisions
R. J. M. Snellings, H. Sorge, S. A. Voloshin, F. Q. Wang, N. Xu
Abstract
For high energy nucleus-nucleus collisions, we show that a combination of space-momentum correlations characteristic of radial expansion together with the correlation between the position of a nucleon in the nucleus and its stopping, results in a very specific rapidity dependence of directed flow: a reversal of sign in the mid-rapidity region. We support our argument by RQMD model calculations for Au+Au collisions at s = 200 AGeV.
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