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Open AccessArticle

Viscous Hydrodynamic Description of the Pseudorapidity Density and Energy Density Estimation for Pb+Pb and Xe+Xe Collisions at the LHC

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College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China
2
Hubei Polytechnic Institute, Xiaogan 432000, China
3
Department of Physics and Electronic-Information Engineering, Hubei Engineering University, Xiaogan 432000, China
4
Key Laboratory of Quark and Lepton Physics (MOE) & Institute of Particle Physics, Wuhan 430079, China
*
Authors to whom correspondence should be addressed.
Universe 2019, 5(5), 112; https://doi.org/10.3390/universe5050112
Received: 23 March 2019 / Revised: 9 May 2019 / Accepted: 9 May 2019 / Published: 10 May 2019
(This article belongs to the Special Issue The Zimányi School and Analytic Hydrodynamics in High Energy Physics)
Based on the analytical solution of accelerating relativistic viscous fluid hydrodynamics and Buda–Lund model, the pseudorapidity distributions of the most central Pb+Pb and Xe+Xe collisions are presented. Inspired by the CNC model, a modified energy density estimation formula is presented to investigate the dependence of the initial energy density estimation on the viscous effect. This new energy density estimation formula shows that the bulk energy is deposited to the neighboring fluid cells in the presence of the shear viscosity and bulk viscosity. In contrast to the well-known CNC energy density estimation formula, a 4.9% enhancement of the estimated energy density at the LHC kinematics is shown. View Full-Text
Keywords: viscous hydrodynamics; pseudorapidity distribution; energy density estimation viscous hydrodynamics; pseudorapidity distribution; energy density estimation
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Gong, X.-T.; Jiang, Z.-F.; She, D.; Yang, C.B. Viscous Hydrodynamic Description of the Pseudorapidity Density and Energy Density Estimation for Pb+Pb and Xe+Xe Collisions at the LHC. Universe 2019, 5, 112.

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