### Abstract

QCD sum-rule techniques are applied to the spectra of and J̌ mesons at finite temperature to investigate the relative importance of quark and gluon condensates and perturbative thermal effects in determining bound-state parameters. Of particular interest are the consequences of nonperturbative physics persisting above the deconfinement phase transition, which is implied by nonzero gluon condensates found in lattice calculations. For the meson, the quark thermal bath induces only a smooth variation in the hadronic parameters as the temperature is increased; the quark condensate and its temperature dependence are the most important factors. For the J̌ meson, perturbative thermal effects overwhelm the gluon condensate contribution at a temperature around 100 MeV, so that high-temperature charmonium physics is consistent with that expected in a weakly interacting quark-gluon plasma. Corrections to other plasma properties from nonperturbative physics are discussed.

Original language | English |
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Pages (from-to) | 1744-1756 |

Number of pages | 13 |

Journal | Physical Review D |

Volume | 42 |

Issue number | 5 |

DOIs | |

Publication status | Published - 1990 Jan 1 |

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### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics

### Cite this

*Physical Review D*,

*42*(5), 1744-1756. https://doi.org/10.1103/PhysRevD.42.1744

}

*Physical Review D*, vol. 42, no. 5, pp. 1744-1756. https://doi.org/10.1103/PhysRevD.42.1744

**Applications of QCD sum rules at finite temperature.** / Furnstahl, R. J.; Hatsuda, T.; Lee, Su H.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Applications of QCD sum rules at finite temperature

AU - Furnstahl, R. J.

AU - Hatsuda, T.

AU - Lee, Su H.

PY - 1990/1/1

Y1 - 1990/1/1

N2 - QCD sum-rule techniques are applied to the spectra of and J̌ mesons at finite temperature to investigate the relative importance of quark and gluon condensates and perturbative thermal effects in determining bound-state parameters. Of particular interest are the consequences of nonperturbative physics persisting above the deconfinement phase transition, which is implied by nonzero gluon condensates found in lattice calculations. For the meson, the quark thermal bath induces only a smooth variation in the hadronic parameters as the temperature is increased; the quark condensate and its temperature dependence are the most important factors. For the J̌ meson, perturbative thermal effects overwhelm the gluon condensate contribution at a temperature around 100 MeV, so that high-temperature charmonium physics is consistent with that expected in a weakly interacting quark-gluon plasma. Corrections to other plasma properties from nonperturbative physics are discussed.

AB - QCD sum-rule techniques are applied to the spectra of and J̌ mesons at finite temperature to investigate the relative importance of quark and gluon condensates and perturbative thermal effects in determining bound-state parameters. Of particular interest are the consequences of nonperturbative physics persisting above the deconfinement phase transition, which is implied by nonzero gluon condensates found in lattice calculations. For the meson, the quark thermal bath induces only a smooth variation in the hadronic parameters as the temperature is increased; the quark condensate and its temperature dependence are the most important factors. For the J̌ meson, perturbative thermal effects overwhelm the gluon condensate contribution at a temperature around 100 MeV, so that high-temperature charmonium physics is consistent with that expected in a weakly interacting quark-gluon plasma. Corrections to other plasma properties from nonperturbative physics are discussed.

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U2 - 10.1103/PhysRevD.42.1744

DO - 10.1103/PhysRevD.42.1744

M3 - Article

VL - 42

SP - 1744

EP - 1756

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 5

ER -