Baryon Stopping in Au+Au and p+p collisions at 62 and 200 GeV

Details Baryon Stopping in Au+Au and p+p collisions at 62 and 200 GeV Baryon Stopping in Au+Au and p+p collisions at 62 and 200 GeV

2009-07-27

arxiv.org/abs/0907.4710v2

Nucl.Phys.A830:841c-844c,2009

Physics

Nuclear Physics

Nuclear Experiment

Proceedings for Quark Matter 2009, for the BRAHMS collaboration

Scientific paper

10.1016/j.nuclphysa.2009.10.008

BRAHMS has measured rapidity density distributions of protons and antiprotons in both p+p and Au+Au collisions at 62 GeV and 200 GeV. From these distributions the yields of so-called "net-protons", that is the difference between the proton and antiproton yields, can be determined. The rapidity dependence of the net-proton yields from peripheral Au+Au collisions is found to have a similar behaviour to that found for the p+p results, while a quite different rapidity dependence is found for central Au+Au collisions. The net-proton distributions can be used together with model calculations to find the net-baryon yields as a function of rapidity, thus yielding information on the average rapidity loss of beam particles, the baryon transport properties of the medium, and the amount of "stopping" in these collisions.

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