Applications of {QCD} Sum Rules at Finite Temperature
Sep, 198931 pages
Published in:
- Phys.Rev.D 42 (1990) 1744-1756
Report number:
- DOE-ER-40322-084,
- UMPP-90-031,
- SUNY-NTG-89-48
Citations per year
Abstract: (APS)
QCD sum-rule techniques are applied to the spectra of ρ and Jψ 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 ρ 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 Jψ 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.- quantum chromodynamics: sum rule
- finite temperature
- rho(770): mass
- mass: rho(770)
- J/psi(3100): mass
- mass: J/psi(3100)
- quark: condensation
- gluon: condensation
- quark gluon: plasma
- Wilson loop
References(39)
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