Mesons at high temperature in QCD

Aarts, Gert; Allton, Chris; Morrin, Richie; Cais, Alan Ó.; Oktay, M. B.; Peardon, Mike; Skullerud, Jon-Ivar

doi:10.1016/j.nuclphysbps.2006.01.033

Cited by 4 publications

(13 citation statements)

References 11 publications

(7 reference statements)

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“…[30] for a study in presence of dynamical fermions). The spectral functions obtained in these studies present, schematically, similar features: a well defined peak in correspondence to the ground state meson in a channel of given angular momentum (S-or P -wave) up to the dissociation temperature; inability to resolve radial excitations; presence in the highest part of the spectrum of peaks that are associated to lattice artifacts.…”

Section: Formalism a Lattice Correlators And Spectral Functionsmentioning

confidence: 99%

“…8 only the bound state part of the S-wave spectral function using a larger effective width, comparable to the one of the lattice charmonium spectral functions calculated in Refs. [23,27] (N f = 0) and [30] (N f = 2). As one can see the pattern as a function of the temperature for the position of the bound state appears to be similar to the lattice results.…”

Section: A Spectral Functionsmentioning

confidence: 99%

“…This is clearly a problem for the calculation of correlators below the critical temperature, since, for instance, at T = 0 the potential model is based on confining potentials and the continuum spectrum has to be added by hand. Secondly, lattice calculations appear to be dominated by finite size artifacts right in the continuum region, leading to unphysical peaks in the spectral functions, even in the infinite temperature limit [30,43]. Moreover, the asymptotic high energy behavior, σ(ω) ∼ ω 2 , of the continuum spectral functions is not reproduced by lattice calculations, since the finite lattice spacing provides an ultraviolet cutoff.…”

Section: Introductionmentioning

confidence: 99%

“…These findings appear in agreement with (quenched) lattice spectral function studies [23,24,25,26,27], at least for what concerns the melting temperatures of charmonia. Lattice results are starting to be available also for the bottomonium spectral function [27,28,29] and for the unquenched case [30].…”

Section: Introductionmentioning

confidence: 99%

“…Such a task is usually achieved with a technique referred to as Maximum Entropy Method (MEM) [35,36] and lattice results using this method can be found in Refs. [23,24,25,26,27,28,29,30].…”

Section: Introductionmentioning

confidence: 99%

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Quarkonia in the deconfined phase: Effective potentials and lattice correlators

et al. 2007

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The Schroedinger equation for the charmonium and bottomonium states at finite temperature is solved by employing an effective temperature dependent potential given by a linear combination of the color singlet free and internal energies obtained on the lattice from the Polyakov loop correlation functions. The melting temperatures and other properties of the quarkonium states are evaluated.The consistency of the potential model approach with the available lattice data on the quarkonium temporal correlators and spectral functions is explored.

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Section: Formalism a Lattice Correlators And Spectral Functionsmentioning

confidence: 99%

Section: A Spectral Functionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Such a task is usually achieved with a technique referred to as Maximum Entropy Method (MEM) [35,36] and lattice results using this method can be found in Refs. [23,24,25,26,27,28,29,30].…”

Section: Introductionmentioning

confidence: 99%

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Quarkonia in the deconfined phase: Effective potentials and lattice correlators

et al. 2007

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Charmonium spectral functions in two-flavour QCD

et al. 2007

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Quarkonia and quark drip lines in a quark-gluon plasma

Wong¹

2007

Phys. Rev. C

106

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We extract the Q-Q potential by using the thermodynamic quantities obtained in lattice gauge calculations. The potential is tested and found to give spontaneous dissociation temperatures that agree well with those from lattice gauge spectral function analysis. Using such a Q-Q potential, we examine the quarkonium states in a quark-gluon plasma and determine the 'quark drip lines' which separate the region of bound color-singlet QQ states from the unbound region. The characteristics of the quark drip lines severely limit the region of possible bound QQ states with light quarks to temperatures close to the phase transition temperature. Bound quarkonia with light quarks may exist very near the phase transition temperature if their effective quark mass is of the order of 300-400 MeV and higher.

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Mesons at high temperature in QCD

Cited by 4 publications

References 11 publications

Quarkonia in the deconfined phase: Effective potentials and lattice correlators

Quarkonia in the deconfined phase: Effective potentials and lattice correlators

Charmonium spectral functions in two-flavour QCD

Quarkonia and quark drip lines in a quark-gluon plasma

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