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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3451

Title: Hot QCD equations of state and relativistic heavy ion collisions
Authors: Chandra, Vinod
Kumar, Ravindra
Ravishankar, V.
Issue Date: Nov-2007
Publisher: The American Physical Society
Citation: Physical Review C, 2007, Vol.76, 054909
Abstract: We study two recently proposed equations of state obtained from high-temperature QCD and show how they can be adapted to use them for making predictions for relativistic heavy ion collisions. The method involves extracting equilibrium distribution functions for quarks and gluons from the equation of state (EOS), which in turn will allow a determination of the transport and other bulk properties of the quark gluon-plasma. Simultaneously, the method also yields a quasiparticle description of interacting quarks and gluons. The first EOS is perturbative in the QCD coupling constant and has contributions of O(g5). The second EOS is an improvement over the first, with contributions up to O[g6ln(1/g)]; it incorporates the nonperturbative hard thermal contributions. The interaction effects are shown to be captured entirely by the effective chemical potentials for the gluons and the quarks, in both cases. The chemical potential is seen to be highly sensitive to the EOS. As an application, we determine the screening lengths, which are, indeed, the most important diagnostics for QGP. The screening lengths are seen to behave drastically differently depending on the EOS considered and therefore yield a way to distinguish the two equations of state in heavy ion collisions.
Description: Open Access.
URI: http://hdl.handle.net/2289/3451
ISSN: E-ISSN: 1089-490X
P-ISSN: 0556-2813
Alternative Location: http://arxiv.org/abs/arXiv:0705.2690
http://dx.doi.org/10.1103/PhysRevC.76.054909
Copyright: 2007 The American Physical Society.
Appears in Collections:Research Papers (LAMP)

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2007 PRD V76 a104016_note.pdfPublisher's note22.5 kBAdobe PDFView/Open
2007 PRC V76 p054909.pdfOpen Access554.43 kBAdobe PDFView/Open

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