High baryon densities achievable in the fragmentation regions at RHIC and LHC

16th International Conference on Strangeness in Quark Matter

Kapusta, Joseph^1 ; Li, Ming^1

School of Physics and Astronomy, University of Minnesota, Minneapolis

MN

55455, United States^1

关键词: Adiabatic expansion;    Atomic nuclei;    Baryon chemical potential;    Baryon density;    Energy-momentum tensor;    Initial temperatures;    Quark-gluon plasma;    Space time;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/779/1/012077/pdf
DOI  :  10.1088/1742-6596/779/1/012077

来源: IOP

【 摘 要 】

We use the McLerran-Venugopalan model of the glasma energy-momentum tensor to compute the rapidity loss and excitation energy of the colliding nuclei in the fragmentation regions followed by a space-time picture to obtain their energy and baryon densities. At the top RHIC energy we find baryon densities up to 3 baryons/fm3, which is 20 times that of atomic nuclei. Assuming the formation of quark-gluon plasma, we find initial temperatures of 200 to 300 MeV and baryon chemical potentials of order 1 GeV. Assuming a roughly adiabatic expansion it would imply trajectories in the T - μ plane which would straddle a possible critical point.