Baryon stopping and saturation physics in relativistic collisions

Details Baryon stopping and saturation physics in relativistic collisions Baryon stopping and saturation physics in relativistic collisions

2009-07-30

arxiv.org/abs/0907.5444v2

Phys. Rev. C 80, 054905 (2009)

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 10 Figures; improved figure inscriptions, corrected typos, minor changes in text/title

Scientific paper

We investigate baryon transport in relativistic heavy-ion collisions at energies reached at the CERN Super Proton Synchrotron, BNL Relativistic Heavy-Ion Collider (RHIC), and CERN LHC in the model of saturation. An analytical scaling law is derived within the color glass condensate framework based on small-coupling QCD. Transverse momentum spectra, net-baryon rapidity distributions and their energy, mass and centrality dependences are well described. 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, and limits for the saturation-scale exponent are determined. Predictions for net-baryon rapidity spectra and the mean rapidity loss in central Pb + Pb collisions at LHC energies of sqrt (s_NN) = 5.52 TeV are made.

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