On the chromo-electric permittivity and Debye screening in hot QCD

V. Chandra, A. Ranjan, V. Ravishankar

Research output: Contribution to journalArticle

18 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)109-117
Number of pages9
JournalEuropean Physical Journal A
Volume40
Issue number1
DOIs
Publication statusPublished - 01-04-2009

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screening
quantum chromodynamics
permittivity
partons
fixing
equations of state
quarks
dissociation
formalism
magnetic permeability
deviation
temperature dependence
estimates
interactions
temperature

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Chandra, V. ; Ranjan, A. ; Ravishankar, V. / On the chromo-electric permittivity and Debye screening in hot QCD. In: European Physical Journal A. 2009 ; Vol. 40, No. 1. pp. 109-117.
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On the chromo-electric permittivity and Debye screening in hot QCD. / Chandra, V.; Ranjan, A.; Ravishankar, V.

In: European Physical Journal A, Vol. 40, No. 1, 01.04.2009, p. 109-117.

Research output: Contribution to journalArticle

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