2016/02/05 by J. Dias de Deus, A. S. Hirsch, C. Pajares +2
Physics and Astronomy · #hep-lat #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.93.024915
published as Phys. Rev. C 93, 024915 (2016) · 5 pages, 4 figures, Accepted for publication in Phys. Rev. C. arXiv admin note: text overlap with arXiv:1501.01524
arxiv created 2016/02/05 · arxiv updated 2016/03/23
From our previously obtained shear viscosity to entropy density ratio (η/s) in the framework of clustering of color sources (Color String Percolation Model: CSPM), we calculate the jet quenching parameter q and trace anomaly Δ= (ε -3\it p)/T4 as a function of temperature. It is shown that the scaled q/T3 is in agreement with the recent JET Collaboration estimates. The inverse of η/s is found to represent Δ. The results for Δ are in excellent agreement with Lattice Quantum Chromo Dynamics (LQCD) simulations. From the trace anomaly and energy density ε, the equation of state is obtained as a function of temperature and compared with LQCD simulations. It is possible that there is a direct connection between the η/s and Δ. Thus the estimate of transport coefficient η/s provides q and Δ as a function of temperature. Both Δ and η/s describe the transition from a strongly coupled QGP to a weakly coupled QGP.