Heavy quarkonium correlators at finite temperature: QCD sum rule approach

Kenji Morita, Su Houng Lee

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

We investigate the properties of heavy quarkonia at finite temperature in detail using QCD sum rules. Extending previous analyses, we take into account a temperature-dependent effective continuum threshold and derive constraints on the mass, the width, and the varying effective continuum threshold. We find that at least one of these quantities of a charmonium changes abruptly in the vicinity of the phase transition. We also calculate the ratio of the imaginary time correlator to its reconstructed one, G/Grec, by constructing a model spectral function and compare it to the corresponding lattice QCD results. We demonstrate that the almost constant unity of G/Grec can be obtained from the destructive interplay of the changes in each part of the spectral modification which are extracted from QCD sum rules.

Original languageEnglish
Article number054008
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume82
Issue number5
DOIs
Publication statusPublished - 2010 Sep 8

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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