Baryon Stopping as a new Probe of Geometric Scaling

Details Baryon Stopping as a new Probe of Geometric Scaling Baryon Stopping as a new Probe of Geometric Scaling

2008-11-11

arxiv.org/abs/0811.1721v3

Phys.Rev.Lett.102:182301,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages 3 figures; calculation and figures now for net baryons instead of net protons; modified conclusions

Scientific paper

We suggest to use net-baryon rapidity distributions in central relativistic heavy-ion collisions at SPS, RHIC and LHC energies in order to probe saturation physics. Within the color glass condensate framework based on small-coupling QCD, net-baryon rapidity distributions are shown to exhibit geometric scaling. In a comparison with RHIC data in Au + Au collisions at sqrt(s_NN) = 62.4 GeV and 200 GeV the gradual approach to the gluon saturation regime is investigated. Predictions for net-baryon rapidity spectra and the mean rapidity loss in central Pb + Pb collisions at LHC energies of sqrt (s_NN) = 5.5 TeV are made.

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