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Title: On the chromo-electric permittivity and Debye screening in hot QCD
Authors: Chandra, Vinod
Ranjan, A.
Ravishankar, V.
Keywords: Relativistic heavy-ion collisions
Quarks, gluons
QCD in nuclear reactions
Issue Date: Apr-2009
Publisher: Springer
Citation: European Physical Journal A, 2009, Vol. 40(1), p109
Abstract: We study the response functions (chromo-electric susceptibilities) for an interacting quark-gluon plasma. The interaction effects have been encoded in the effective fugacities for quasi-partons which are extracted self-consistently from the two equations of state for hot QCD. The first one is the fully perturbative O(g 5) EOS and the second one, which is O(g 6ln(1/g)) , incorporates some non-perturbative effects. We find that the response function shows large deviations from the ideal behavior. We further determine the temperature dependence of the Debye mass by fixing the effective coupling constant Q2 which appears in the transport equation. We show that our formalism naturally yields the leading-order HTL expression for the Debye mass if we employ the ideal EOS. Employing the Debye mass, we estimate the dissociation temperatures for various charmonium and bottomonium bound states. These results are consistent with the current theoretical studies.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 1434-6001
1434-601X (Online)
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Copyright: 2009 Springer
Appears in Collections:Research Papers (LAMP)

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