Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/3906
Title: | Quasi-particle model for lattice QCD: quark-gluon plasma in heavy ion collisions |
Authors: | Chandra, Vinod Ravishankar, V. |
Issue Date: | 12-Sep-2009 |
Publisher: | Springer - Verlag |
Citation: | European Physical Journal-C, 2009, Vol.64, p63 |
Abstract: | We propose a quasi-particle model to describe the lattice QCD equation of state for pure SU(3) gauge theory in its deconfined state, for T≥1.5T c. The method involves mapping the interaction part of the equation of state to an effective fugacity of otherwise non-interacting quasi-gluons. We find that this mapping is exact. Using the quasi-gluon distribution function, we determine the energy density and the modified dispersion relation for the single particle energy, in which the trace anomaly is manifest. As an application, we first determine the Debye mass, and then the important transport parameters, viz., the shear viscosity, η, and the shear viscosity to entropy density ratio, $\eta/{\mathcal{S}}$. We find that both η and $\eta/{\mathcal{S}}$ are sensitive to the interactions, and that the interactions significantly lower both η and $\eta/\mathcal{S}$. |
Description: | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations) |
URI: | http://hdl.handle.net/2289/3906 |
ISSN: | 1434-6044 1434-6052 (Online) |
Alternative Location: | http://arxiv.org/abs/0812.1430 http://dx.doi.org/10.1140/epjc/s10052-009-1126-8 http://adsabs.harvard.edu/abs/2009EPJC...64...63C |
Copyright: | 2009 Springer-Verlag |
Appears in Collections: | Research Papers (TP) |
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2009_EPJ-C_V64_p63.pdf Restricted Access | Restricted Access | 490.15 kB | Adobe PDF | View/Open Request a copy |
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